libavcodec/flacdec.c:311: error: Uninitialized Value
  The value read from c was never initialized.

libavcodec/flacdec.c:311:36: 
309.     case 3:
310.         for (i = pred_order; i < blocksize; i++)
311.             decoded[i] = a += b += c += decoded[i];
                                        ^
312.         break;
313.     case 4:
