libavcodec/flacdec.c:292: error: Uninitialized Value
  The value read from a was never initialized.

libavcodec/flacdec.c:292:9: 
290.         a = decoded[pred_order-1];
291.     if (pred_order > 1)
292.         b = a - decoded[pred_order-2];
             ^
293.     if (pred_order > 2)
294.         c = b - decoded[pred_order-2] + decoded[pred_order-3];
