libavcodec/dca.c:702: error: Uninitialized Value
  The value read from diff[_] was never initialized.

libavcodec/dca.c:702:13: 
700.             subband_fir_hist[k] = cos_mod[j++] * sum[k];
701.         for (k = 0; k < 16; k++)
702.             subband_fir_hist[32-k-1] = cos_mod[j++] * diff[k];
                 ^
703. 
704.         /* Multiply by filter coefficients */
