libavcodec/mjpegdec.c:676: error: Uninitialized Value
  The value read from top[_] was never initialized.

libavcodec/mjpegdec.c:676:17: 
674.                 int pred;
675. 
676.                 topleft[i] = top[i];
                     ^
677.                 top[i]     = buffer[mb_x][i];
678. 
