TT#14008 use FILLED flag instead of advertised address for sink test

The advertised address might be empty (trickle ICE) so use the FILLED
flag instead to see if the sink is eligible.

Change-Id: I114bd7400ccfcc3ecbc871bdcc5aee4e7d699816

daemon/media_socket.c

@@ -1254,8 +1254,7 @@ output:
 	// output section
 	if (non_forwarding) // also applies to sink == NULL
 		return NULL; // no output
-	if (is_addr_unspecified(&sink->advertised_endpoint.address)
-			|| !sink->advertised_endpoint.port)
+	if (!PS_ISSET(sink, FILLED))
 		return NULL;
 
 	redi = g_slice_alloc0(sizeof(*redi));