libavcodec/ljpegenc.c:95: error: Uninitialized Value
  The value read from topleft[_] was never initialized.

libavcodec/ljpegenc.c:95:17: 
93.                 int pred, diff;
94. 
95.                 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
                    ^
96. 
97.                 topleft[i] = top[i];
