Merge commit 'b46b233b'

* commit 'b46b233b':
  filmstripdec: avoid integer overflow
Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/filmstripdec.c

@@ -84,7 +84,7 @@ static int read_packet(AVFormatContext *s,
         return AVERROR(EIO);
     pkt->dts = avio_tell(s->pb) / (st->codec->width * (st->codec->height + film->leading) * 4);
     pkt->size = av_get_packet(s->pb, pkt, st->codec->width * st->codec->height * 4);
-    avio_skip(s->pb, st->codec->width * film->leading * 4);
+    avio_skip(s->pb, st->codec->width * (int64_t) film->leading * 4);
     if (pkt->size < 0)
         return pkt->size;
     pkt->flags |= AV_PKT_FLAG_KEY;