remove bogus 'network' member of 'struct gsm_transaction'

Since a transaction is associated to a gsm_subscriber, and the subsciber
is part of a network, we don't need to have a dedicated transaction->network
pointer.
diff --git a/openbsc/src/gsm_04_08.c b/openbsc/src/gsm_04_08.c
index 76c6e0d..44f8672 100644
--- a/openbsc/src/gsm_04_08.c
+++ b/openbsc/src/gsm_04_08.c
@@ -1900,7 +1900,7 @@
 	/* send release to L4, if callref still exists */
 	if (trans->callref) {
 		/* Ressource unavailable */
-		mncc_release_ind(trans->network, trans, trans->callref,
+		mncc_release_ind(trans->subscr->net, trans, trans->callref,
 				 GSM48_CAUSE_LOC_PRN_S_LU,
 				 GSM48_CC_CAUSE_RESOURCE_UNAVAIL);
 	}
@@ -1956,7 +1956,8 @@
 			DEBUGP(DCC, "Paging subscr %s expired!\n",
 				subscr->extension);
 			/* Temporarily out of order */
-			mncc_release_ind(transt->network, transt, transt->callref,
+			mncc_release_ind(transt->subscr->net, transt,
+					 transt->callref,
 					 GSM48_CAUSE_LOC_PRN_S_LU,
 					 GSM48_CC_CAUSE_DEST_OOO);
 			transt->callref = 0;
@@ -2131,7 +2132,7 @@
 
 	if (release && trans->callref) {
 		/* process release towards layer 4 */
-		mncc_release_ind(trans->network, trans, trans->callref,
+		mncc_release_ind(trans->subscr->net, trans, trans->callref,
 				 l4_location, l4_cause);
 		trans->callref = 0;
 	}
@@ -2139,7 +2140,7 @@
 	if (disconnect && trans->callref) {
 		/* process disconnect towards layer 4 */
 		mncc_set_cause(&l4_rel, l4_location, l4_cause);
-		mncc_recvmsg(trans->network, trans, MNCC_DISC_IND, &l4_rel);
+		mncc_recvmsg(trans->subscr->net, trans, MNCC_DISC_IND, &l4_rel);
 	}
 
 	/* process disconnect towards mobile station */
@@ -2240,7 +2241,7 @@
 	new_cc_state(trans, GSM_CSTATE_INITIATED);
 
 	/* indicate setup to MNCC */
-	mncc_recvmsg(trans->network, trans, MNCC_SETUP_IND, &setup);
+	mncc_recvmsg(trans->subscr->net, trans, MNCC_SETUP_IND, &setup);
 
 	return 0;
 }
@@ -2261,7 +2262,7 @@
 		DEBUGP(DCC, "TX Setup with assigned transaction. "
 			"This is not allowed!\n");
 		/* Temporarily out of order */
-		rc = mncc_release_ind(trans->network, trans, trans->callref,
+		rc = mncc_release_ind(trans->subscr->net, trans, trans->callref,
 				      GSM48_CAUSE_LOC_PRN_S_LU,
 				      GSM48_CC_CAUSE_RESOURCE_UNAVAIL);
 		trans->callref = 0;
@@ -2270,7 +2271,7 @@
 	}
 	
 	/* Get free transaction_id */
-	llist_for_each_entry(transt, &trans->network->trans_list, entry) {
+	llist_for_each_entry(transt, &trans->subscr->net->trans_list, entry) {
 		/* Transaction of our lchan? */
 		if (transt->lchan == trans->lchan &&
 		    transt->transaction_id != 0xff)
@@ -2279,7 +2280,7 @@
 	/* Assign free transaction ID */
 	if ((trans_id_mask & 0x007f) == 0x7f) {
 		/* no free transaction ID */
-		rc = mncc_release_ind(trans->network, trans, trans->callref,
+		rc = mncc_release_ind(trans->subscr->net, trans, trans->callref,
 				      GSM48_CAUSE_LOC_PRN_S_LU,
 				      GSM48_CC_CAUSE_RESOURCE_UNAVAIL);
 		trans->callref = 0;
@@ -2370,7 +2371,8 @@
 
 	new_cc_state(trans, GSM_CSTATE_MO_TERM_CALL_CONF);
 
-	return mncc_recvmsg(trans->network, trans, MNCC_CALL_CONF_IND, &call_conf);
+	return mncc_recvmsg(trans->subscr->net, trans, MNCC_CALL_CONF_IND,
+			    &call_conf);
 }
 
 static int gsm48_cc_tx_call_proc(struct gsm_trans *trans, void *arg)
@@ -2433,7 +2435,8 @@
 
 	new_cc_state(trans, GSM_CSTATE_CALL_RECEIVED);
 
-	return mncc_recvmsg(trans->network, trans, MNCC_ALERT_IND, &alerting);
+	return mncc_recvmsg(trans->subscr->net, trans, MNCC_ALERT_IND,
+			    &alerting);
 }
 
 static int gsm48_cc_tx_alerting(struct gsm_trans *trans, void *arg)
@@ -2552,7 +2555,7 @@
 
 	new_cc_state(trans, GSM_CSTATE_CONNECT_REQUEST);
 
-	return mncc_recvmsg(trans->network, trans, MNCC_SETUP_CNF, &connect);
+	return mncc_recvmsg(trans->subscr->net, trans, MNCC_SETUP_CNF, &connect);
 }
 
 
@@ -2566,7 +2569,7 @@
 	
 	memset(&connect_ack, 0, sizeof(struct gsm_mncc));
 	connect_ack.callref = trans->callref;
-	return mncc_recvmsg(trans->network, trans, MNCC_SETUP_COMPL_IND,
+	return mncc_recvmsg(trans->subscr->net, trans, MNCC_SETUP_COMPL_IND,
 			    &connect_ack);
 }
 
@@ -2623,7 +2626,7 @@
 				 TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1);
 	}
 
-	return mncc_recvmsg(trans->network, trans, MNCC_DISC_IND, &disc);
+	return mncc_recvmsg(trans->subscr->net, trans, MNCC_DISC_IND, &disc);
 
 }
 
@@ -2714,11 +2717,12 @@
 
 	if (trans->cc.state == GSM_CSTATE_RELEASE_REQ) {
 		/* release collision 5.4.5 */
-		rc = mncc_recvmsg(trans->network, trans, MNCC_REL_CNF, &rel);
+		rc = mncc_recvmsg(trans->subscr->net, trans, MNCC_REL_CNF, &rel);
 	} else {
-		rc = gsm48_tx_simple(msg->lchan, GSM48_PDISC_CC | trans->transaction_id,
-			     GSM48_MT_CC_RELEASE_COMPL);
-		rc = mncc_recvmsg(trans->network, trans, MNCC_REL_IND, &rel);
+		rc = gsm48_tx_simple(msg->lchan,
+				     GSM48_PDISC_CC | trans->transaction_id,
+				     GSM48_MT_CC_RELEASE_COMPL);
+		rc = mncc_recvmsg(trans->subscr->net, trans, MNCC_REL_IND, &rel);
 	}
 
 	new_cc_state(trans, GSM_CSTATE_NULL);
@@ -2804,15 +2808,15 @@
 	if (trans->callref) {
 		switch (trans->cc.state) {
 		case GSM_CSTATE_CALL_PRESENT:
-			rc = mncc_recvmsg(trans->network, trans,
+			rc = mncc_recvmsg(trans->subscr->net, trans,
 					  MNCC_REJ_IND, &rel);
 			break;
 		case GSM_CSTATE_RELEASE_REQ:
-			rc = mncc_recvmsg(trans->network, trans,
+			rc = mncc_recvmsg(trans->subscr->net, trans,
 					  MNCC_REL_CNF, &rel);
 			break;
 		default:
-			rc = mncc_recvmsg(trans->network, trans,
+			rc = mncc_recvmsg(trans->subscr->net, trans,
 					  MNCC_REL_IND, &rel);
 		}
 	}
@@ -2875,7 +2879,7 @@
 				 TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1);
 	}
 
-	return mncc_recvmsg(trans->network, trans, MNCC_FACILITY_IND, &fac);
+	return mncc_recvmsg(trans->subscr->net, trans, MNCC_FACILITY_IND, &fac);
 }
 
 static int gsm48_cc_tx_facility(struct gsm_trans *trans, void *arg)
@@ -2900,7 +2904,7 @@
 
 	memset(&hold, 0, sizeof(struct gsm_mncc));
 	hold.callref = trans->callref;
-	return mncc_recvmsg(trans->network, trans, MNCC_HOLD_IND, &hold);
+	return mncc_recvmsg(trans->subscr->net, trans, MNCC_HOLD_IND, &hold);
 }
 
 static int gsm48_cc_tx_hold_ack(struct gsm_trans *trans, void *arg)
@@ -2940,7 +2944,8 @@
 
 	memset(&retrieve, 0, sizeof(struct gsm_mncc));
 	retrieve.callref = trans->callref;
-	return mncc_recvmsg(trans->network, trans, MNCC_RETRIEVE_IND, &retrieve);
+	return mncc_recvmsg(trans->subscr->net, trans, MNCC_RETRIEVE_IND,
+			    &retrieve);
 }
 
 static int gsm48_cc_tx_retrieve_ack(struct gsm_trans *trans, void *arg)
@@ -2991,7 +2996,7 @@
 			      TLVP_VAL(&tp, GSM48_IE_KPD_FACILITY)-1);
 	}
 
-	return mncc_recvmsg(trans->network, trans, MNCC_START_DTMF_IND, &dtmf);
+	return mncc_recvmsg(trans->subscr->net, trans, MNCC_START_DTMF_IND, &dtmf);
 }
 
 static int gsm48_cc_tx_start_dtmf_ack(struct gsm_trans *trans, void *arg)
@@ -3049,7 +3054,7 @@
 	memset(&dtmf, 0, sizeof(struct gsm_mncc));
 	dtmf.callref = trans->callref;
 
-	return mncc_recvmsg(trans->network, trans, MNCC_STOP_DTMF_IND, &dtmf);
+	return mncc_recvmsg(trans->subscr->net, trans, MNCC_STOP_DTMF_IND, &dtmf);
 }
 
 static int gsm48_cc_rx_modify(struct gsm_trans *trans, struct msgb *msg)
@@ -3071,7 +3076,7 @@
 
 	new_cc_state(trans, GSM_CSTATE_MO_ORIG_MODIFY);
 
-	return mncc_recvmsg(trans->network, trans, MNCC_MODIFY_IND, &modify);
+	return mncc_recvmsg(trans->subscr->net, trans, MNCC_MODIFY_IND, &modify);
 }
 
 static int gsm48_cc_tx_modify(struct gsm_trans *trans, void *arg)
@@ -3115,7 +3120,7 @@
 
 	new_cc_state(trans, GSM_CSTATE_ACTIVE);
 
-	return mncc_recvmsg(trans->network, trans, MNCC_MODIFY_CNF, &modify);
+	return mncc_recvmsg(trans->subscr->net, trans, MNCC_MODIFY_CNF, &modify);
 }
 
 static int gsm48_cc_tx_modify_complete(struct gsm_trans *trans, void *arg)
@@ -3163,7 +3168,7 @@
 
 	new_cc_state(trans, GSM_CSTATE_ACTIVE);
 
-	return mncc_recvmsg(trans->network, trans, MNCC_MODIFY_REJ, &modify);
+	return mncc_recvmsg(trans->subscr->net, trans, MNCC_MODIFY_REJ, &modify);
 }
 
 static int gsm48_cc_tx_modify_reject(struct gsm_trans *trans, void *arg)
@@ -3215,7 +3220,7 @@
 	if (payload_len >= 1)
 		decode_notify(&notify.notify, gh->data);
 
-	return mncc_recvmsg(trans->network, trans, MNCC_NOTIFY_IND, &notify);
+	return mncc_recvmsg(trans->subscr->net, trans, MNCC_NOTIFY_IND, &notify);
 }
 
 static int gsm48_cc_tx_userinfo(struct gsm_trans *trans, void *arg)
@@ -3258,7 +3263,7 @@
 	if (TLVP_PRESENT(&tp, GSM48_IE_MORE_DATA))
 		user.more = 1;
 
-	return mncc_recvmsg(trans->network, trans, MNCC_USERINFO_IND, &user);
+	return mncc_recvmsg(trans->subscr->net, trans, MNCC_USERINFO_IND, &user);
 }
 
 static int gsm48_lchan_modify(struct gsm_trans *trans, void *arg)