Merge commit '2620df13104ddaa136158eb6bb1195adbf9d7692'

* commit '2620df13104ddaa136158eb6bb1195adbf9d7692':
  mov: Free an earlier allocated array if allocating a new one

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

libavformat/mov.c

@@ -1913,6 +1913,7 @@ static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     if (entries >= UINT_MAX / sizeof(*sc->stts_data))
         return -1;
 
+    av_free(sc->stts_data);
     sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
     if (!sc->stts_data)
         return AVERROR(ENOMEM);