libavfilter/avfilter.c:322: error: Uninitialized Value
  The value read from src[_] was never initialized.

libavfilter/avfilter.c:322:17: 
320.                 ff_get_plane_bytewidth(link->format, link->cur_pic->w, i);
321. 
322.             if(!src[i]) continue;
                     ^
323. 
324.             for(j = 0; j < h >> (i==0 ? 0 : vsub); j ++) {
