TT#14008 fix possible segfault when out of ports

closes #1243

Change-Id: Ib04c289ad78624139c0375423a7bc1ad402874e7
(cherry picked from commit 6cc1e99ee8)

daemon/media_socket.c

@@ -1535,7 +1535,9 @@ static void media_packet_rtcp_demux(struct packet_handler_ctx *phc)
 		}
 	}
 	phc->out_srtp = phc->sink;
-	if (phc->rtcp && phc->sink && phc->sink->rtcp_sibling)
+	if (!phc->sink)
+		return;
+	if (phc->rtcp && phc->sink->rtcp_sibling)
 		phc->out_srtp = phc->sink->rtcp_sibling; // use RTCP SRTP context
 
 	phc->mp.media_out = phc->sink->media;
@@ -1546,6 +1548,8 @@ static void media_packet_rtp(struct packet_handler_ctx *phc)
 {
 	phc->payload_type = -1;
 
+	if (G_UNLIKELY(!phc->mp.media))
+		return;
 	if (G_UNLIKELY(!proto_is_rtp(phc->mp.media->protocol)))
 		return;