libavcodec/bink.c:688: error: Uninitialized Value
  The value read from coef_idx[_] was never initialized.

libavcodec/bink.c:688:9: 
686.     block[0] = (block[0] * quant[0]) >> 11;
687.     for (i = 0; i < coef_count; i++) {
688.         int idx = coef_idx[i];
             ^
689.         block[scan[idx]] = (block[scan[idx]] * quant[idx]) >> 11;
690.     }
