libavcodec/wmaprodec.c:862: error: Uninitialized Value
  The value read from vals[_] was never initialized.

libavcodec/wmaprodec.c:862:17: 
860.         /** decode sign */
861.         for (i = 0; i < 4; i++) {
862.             if (vals[i]) {
                     ^
863.                 uint32_t sign = bitstream_read_bit(&s->bc) - 1;
864.                 AV_WN32A(&ci->coeffs[cur_coeff], vals[i] ^ sign << 31);
