libavcodec/flacdec.c:296: error: Uninitialized Value
  The value read from c was never initialized.

libavcodec/flacdec.c:296:9: 
294.         c = b - decoded[pred_order-2] + decoded[pred_order-3];
295.     if (pred_order > 3)
296.         d = c - decoded[pred_order-2] + 2*decoded[pred_order-3] - decoded[pred_order-4];
             ^
297. 
298.     switch (pred_order) {
