avformat/mov: use 64bit for size in mov_skip_multiple_stsd()

Fixes integer overflow
Fixes Ticket 3866
Reviewed-by: Christophe Gisquet <christophe.gisquet@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/mov.c

@@ -1635,7 +1635,7 @@ static int mov_finalize_stsd_codec(MOVContext *c, AVIOContext *pb,
 
 static int mov_skip_multiple_stsd(MOVContext *c, AVIOContext *pb,
                                   int codec_tag, int format,
-                                  int size)
+                                  int64_t size)
 {
     int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);