libavcodec/wmaprodec.c:821: error: Uninitialized Value
  The value read from vals[_] was never initialized.

libavcodec/wmaprodec.c:821:17: 
819.             if (vals[i]) {
820.                 int sign = get_bits1(&s->gb) - 1;
821.                 ci->coeffs[cur_coeff] = (vals[i] ^ sign) - sign;
                     ^
822.                 num_zeros = 0;
823.             } else {
