libavcodec/cavsdec.c:355: error: Uninitialized Value
  The value read from sub_type[_] was never initialized.

libavcodec/cavsdec.c:355:13: 
353.                         MV_PRED_MEDIAN, BLK_8X8, 1);
354.                 break;
355.             case B_SUB_SYM:
                 ^
356.                 ff_cavs_mv(h, mv_scan[block], mv_scan[block]-3,
357.                         MV_PRED_MEDIAN, BLK_8X8, 1);
