GSMTAP: Fix channel type for data blocks: PDTCH instead of PACCH

PACCH is used only for RLC/MAC control messages, while PDTCH is used
for data.

Change-Id: I6c912e17d8c8d4178096679a541e61eeeb4b6643
diff --git a/src/gprs_rlcmac_sched.cpp b/src/gprs_rlcmac_sched.cpp
index e5c8ec8..42f0308 100644
--- a/src/gprs_rlcmac_sched.cpp
+++ b/src/gprs_rlcmac_sched.cpp
@@ -367,7 +367,7 @@
 		if (msg) {
 			bts->bts->rlc_sent();
 			/* FIXME: distinguish between GPRS and EGPRS */
-			bts->bts->send_gsmtap(PCU_GSMTAP_C_DL_DATA_GPRS, false, trx, ts, GSMTAP_CHANNEL_PACCH, fn, msg->data, msg->len);
+			bts->bts->send_gsmtap(PCU_GSMTAP_C_DL_DATA_GPRS, false, trx, ts, GSMTAP_CHANNEL_PDTCH, fn, msg->data, msg->len);
 		}
 	}