libavcodec/mjpegdec.c:539: error: Uninitialized Value
  The value read from top[_] was never initialized.

libavcodec/mjpegdec.c:539:17: 
537.                 int pred;
538. 
539.                 topleft[i]= top[i];
                     ^
540.                 top[i]= buffer[mb_x][i];
541. 
