typo (fixes wmv1 regression test in c)

Originally committed as revision 1621 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/mpegvideo.c

@@ -3922,7 +3922,7 @@ static void dct_unquantize_h263_c(MpegEncContext *s,
         nCoeffs= 63; //does not allways use zigzag table 
     } else {
         i = 0;
-        nCoeffs= s->intra_scantable.raster_end[ s->block_last_index[n] ];
+        nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
     }
 
     for(;i<=nCoeffs;i++) {