libavcodec/wmadec.c:693: error: Uninitialized Value
  The value read from nb_coefs[_] was never initialized.

libavcodec/wmadec.c:693:17: 
691.                 for (i = 0; i < s->coefs_start; i++)
692.                     *coefs++ = 0.0;
693.                 n = nb_coefs[ch];
                     ^
694.                 for (i = 0; i < n; i++)
695.                     *coefs++ = coefs1[i] * exponents[i << bsize >> esize] * mult;
