Merge commit '93f919d0b4c4341ccee366c98ac9af813f8fe622' into release/1.1

* commit '93f919d0b4c4341ccee366c98ac9af813f8fe622':
  mov: avoid a memleak when multiple stss boxes are present

Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/mov.c

@@ -1690,6 +1690,7 @@ static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     }
     if (entries >= UINT_MAX / sizeof(int))
         return AVERROR_INVALIDDATA;
+    av_freep(&sc->keyframes);
     sc->keyframes = av_malloc(entries * sizeof(int));
     if (!sc->keyframes)
         return AVERROR(ENOMEM);