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
(cherry picked from commit f6461ab452)

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));