bsc_msc: Remove use_count from the subscriber connection

A channel will be released in case of
    * Errors via the clear_request callback...
    * no more transactions and operations are going on.

This means that if we do something without a transaction
the channel might be closed down right away. The bug fix
will be to create a transaction/operation.
diff --git a/openbsc/src/handover_logic.c b/openbsc/src/handover_logic.c
index b75dc98..baf03b3 100644
--- a/openbsc/src/handover_logic.c
+++ b/openbsc/src/handover_logic.c
@@ -231,7 +231,7 @@
 	trans_lchan_change(ho->old_lchan->conn, new_lchan->conn);
 
 	rsl_lchan_set_state(ho->old_lchan, LCHAN_S_INACTIVE);
-	lchan_auto_release(ho->old_lchan);
+	lchan_release(ho->old_lchan, 0, 1);
 
 	/* do something to re-route the actual speech frames ! */
 
@@ -259,7 +259,6 @@
 	bsc_del_timer(&ho->T3103);
 	llist_del(&ho->list);
 	conn = ho->new_lchan->conn;
-	put_subscr_con(conn);
 	talloc_free(ho);
 
 	return 0;