code claims to use 32bit timestamp, lets make it also use that

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@8662 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavformat/bethsoftvid.c

@@ -40,7 +40,7 @@ typedef struct BVID_DemuxContext
 
     /** video presentation time stamp.
      * delay = 16 milliseconds * (global_delay + per_frame_delay) */
-    int64_t video_pts;
+    int video_pts;
 
     int is_finished;