avformat/movenchint: use realloc_array() to protect against integer overflow

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

libavformat/movenchint.c

@@ -105,7 +105,7 @@ static void sample_queue_push(HintSampleQueue *queue, uint8_t *data, int size,
         return;
     if (!queue->samples || queue->len >= queue->size) {
         HintSample *samples;
-        samples = av_realloc(queue->samples, sizeof(HintSample) * (queue->size + 10));
+        samples = av_realloc_array(queue->samples, queue->size + 10, sizeof(HintSample));
         if (!samples)
             return;
         queue->size += 10;