libavcodec/vc1.c:3167: error: Uninitialized Value
  The value read from is_intra[_] was never initialized.

libavcodec/vc1.c:3167:24: 
3165.                 int intrapred = 0;
3166.                 for(i=0; i<6; i++)
3167.                     if(is_intra[i]) {
                             ^
3168.                         if(((!s->first_slice_line || (i==2 || i==3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])
3169.                             || ((s->mb_x || (i==1 || i==3)) && v->mb_type[0][s->block_index[i] - 1])) {
