Proper condition in xvmc decode mb.

The old one would try to use mv blocks that are written outside their buffer,
in case of unhandled error.


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@17315 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/mpegvideo_xvmc.c

@@ -297,6 +297,6 @@ void ff_xvmc_decode_mb(MpegEncContext *s)
      * blocks. */
 
 
-    if (render->filled_mv_blocks_num >= render->total_number_of_mv_blocks)
+    if (render->filled_mv_blocks_num == render->total_number_of_mv_blocks)
         ff_draw_horiz_band(s, 0, 0);
 }