libavcodec/ljpegenc.c:89: error: Uninitialized Value
  The value read from topleft[_] was never initialized.

libavcodec/ljpegenc.c:89:21: 
87.                     int pred, diff;
88. 
89.                     PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
                        ^
90. 
91.                     topleft[i]= top[i];
