libavcodec/vc1dec.c:5078: error: Uninitialized Value
  The value read from xoff[_] was never initialized.

libavcodec/vc1dec.c:5078:25: 
5076.                 }
5077.                 if (!(xoff[sprite] & 0xFFFF) && xadv[sprite] == 1 << 16) {
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;
