libavcodec/vc1dec.c:3448: error: Uninitialized Value
  The value read from xoff[_] was never initialized.

libavcodec/vc1dec.c:3448:25: 
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;
                              ^
3449.                 } else {
3450.                     if (sr_cache[sprite][0] != yline) {
