libavcodec/opus_silk.c:821: error: Uninitialized Value
  The value read from k was never initialized.

libavcodec/opus_silk.c:821:25: 
819. 
820.             /* lower extent */
821.             for (i = 0; i < k; i++)
                             ^
822.                 min_center += min_delta[i];
823.             min_center += min_delta[k] >> 1;
