libavcodec/ljpegenc.c:91: error: Uninitialized Value
  The value read from top[_] was never initialized.

libavcodec/ljpegenc.c:91:21: 
89.                     PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
90. 
91.                     topleft[i]= top[i];
                        ^
92.                     top[i]= buffer[x+1][i];
93. 
