libavcodec/vc1dec.c:5080: error: Uninitialized Value
  The value read from xoff[_] was never initialized.

libavcodec/vc1dec.c:5080:25: 
5078.                         src_h[sprite][0] = iplane + (xoff[sprite] >> 16) +  yline      * iline;
5079.                     if (ysub[sprite])
5080.                         src_h[sprite][1] = iplane + (xoff[sprite] >> 16) + (yline + 1) * iline;
                              ^
5081.                 } else {
5082.                     if (sr_cache[sprite][0] != yline) {
