MT#55283 don't pick an unsupported PT for playback

Make sure we properly return a failure if no supported payload type is
present.

Change-Id: Ia483e0819b2d8ca0c2c5184c929dfe3d05c96ca1
(cherry picked from commit 5f6609de5d)

daemon/media_player.c

@@ -680,6 +680,7 @@ static struct rtp_payload_type *media_player_get_dst_pt(struct media_player *mp)
 		ensure_codec_def(dst_pt, mp->media);
 		if (codec_def_supported(dst_pt->codec_def) && !dst_pt->codec_def->supplemental)
 			goto found;
+		dst_pt = NULL;
 	}
 	if (!dst_pt) {
 		ilog(LOG_ERR, "No supported output codec found in SDP");