libavcodec/flac.c:289: error: Uninitialized Value
  The value read from c was never initialized.

libavcodec/flac.c:289:9: 
287.         c = b - decoded[pred_order-2] + decoded[pred_order-3];
288.     if(pred_order > 3)
289.         d = c - decoded[pred_order-2] + 2*decoded[pred_order-3] - decoded[pred_order-4];
             ^
290. 
291.     switch(pred_order)
