libavfilter/avfilter.c:360: error: Uninitialized Value
  The value read from src[_] was never initialized.

libavfilter/avfilter.c:360:17: 
358.                 av_get_image_linesize(link->format, link->cur_buf->video->w, i);
359. 
360.             if(!src[i]) continue;
                     ^
361. 
362.             for(j = 0; j < h >> (i==0 ? 0 : vsub); j ++) {
