ASCI: rtp_stream_commit(): Also update MGW on conn mode change

So far rtp_stream_commit() triggers an MGCP MDCX message only when
codecs or the RTP address changed.
Do the same for mode changes. ('sendrecv', 'recvonly', 'sendonly',...)

Change-Id: I7a5637d0a7f1df13133e522fc78ba75eeeb2873e
Related: OS#4854
diff --git a/src/libmsc/call_leg.c b/src/libmsc/call_leg.c
index 2c75d96..b078c77 100644
--- a/src/libmsc/call_leg.c
+++ b/src/libmsc/call_leg.c
@@ -336,7 +336,7 @@
 {
 	if (call_leg_ensure_rtp_alloc(cl, dir, call_id, for_trans))
 		return -EIO;
-	cl->rtp[dir]->crcx_conn_mode = cl->crcx_conn_mode[dir];
+	rtp_stream_set_mode(cl->rtp[dir], cl->crcx_conn_mode[dir]);
 	if (dir == RTP_TO_RAN && cl->ran_peer_supports_osmux) {
 		cl->rtp[dir]->use_osmux = true;
 		cl->rtp[dir]->remote_osmux_cid = -1; /* wildcard */