libavcodec/wmaprodec.c:832: error: Uninitialized Value
  The value read from vals[_] was never initialized.

libavcodec/wmaprodec.c:832:17: 
830.         /** decode sign */
831.         for (i = 0; i < 4; i++) {
832.             if (vals[i]) {
                     ^
833.                 int sign = get_bits1(&s->gb) - 1;
834.                 *(uint32_t*)&ci->coeffs[cur_coeff] = vals[i] ^ sign<<31;
