MT#55283 catch possible NULL pointer

Creating the codec handler can possibly fail. Catch that case.

Closes #1693

Change-Id: Iebd8d1c6aa3542cd9e1351756148c48ebada38ec
(cherry picked from commit 94ba3e0fa8)

daemon/codec.c

@@ -511,6 +511,10 @@ struct codec_handler *codec_handler_make_playback(const struct rtp_payload_type
 	rtp_payload_type_copy(&handler->dest_pt, dst_pt);
 	handler->handler_func = handler_func_playback;
 	handler->ssrc_handler = (void *) __ssrc_handler_transcode_new(handler);
+	if (!handler->ssrc_handler) {
+		codec_handler_free(&handler);
+		return NULL;
+	}
 	handler->ssrc_handler->first_ts = last_ts;
 	while (handler->ssrc_handler->first_ts == 0)
 		handler->ssrc_handler->first_ts = ssl_random();