libavcodec/vc1dec.c:3446: error: Uninitialized Value
  The value read from xoff[_] was never initialized.

libavcodec/vc1dec.c:3446:25: 
3444.                 }
3445.                 if (!(xoff[sprite]&0xFFFF) && xadv[sprite] == 1<<16) {
3446.                         src_h[sprite][0] = iplane+(xoff[sprite]>>16)+ yline   *iline;
                              ^
3447.                     if (ysub[sprite])
3448.                         src_h[sprite][1] = iplane+(xoff[sprite]>>16)+(yline+1)*iline;
