Merge commit 'e0caa1eb'

* commit 'e0caa1eb':
  matroskadec: check return values

Conflicts:
	libavformat/matroskadec.c

See: 1116491cMerged-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/matroskadec.c

@@ -2328,10 +2328,15 @@ static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
     }
 
     while (track->audio.pkt_cnt) {
-        AVPacket *pkt = NULL;
-        if (!(pkt = av_mallocz(sizeof(AVPacket))) || av_new_packet(pkt, a) < 0) {
-            av_free(pkt);
+        int ret;
+        AVPacket *pkt = av_mallocz(sizeof(AVPacket));
+        if (!pkt)
             return AVERROR(ENOMEM);
+
+        ret = av_new_packet(pkt, a);
+        if (ret < 0) {
+            av_free(pkt);
+            return ret;
         }
         memcpy(pkt->data,
                track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),