libavcodec/ljpegenc.c:97: error: Uninitialized Value
  The value read from top[_] was never initialized.

libavcodec/ljpegenc.c:97:17: 
95.                 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
96. 
97.                 topleft[i] = top[i];
                    ^
98.                 top[i]     = buffer[x+1][i];
99. 
