libavcodec/wmaenc.c:238: error: Uninitialized Value
  The value read from nb_coefs[_] was never initialized.

libavcodec/wmaenc.c:238:17: 
236.             } else {
237.                 coefs += s->coefs_start;
238.                 n      = nb_coefs[ch];
                     ^
239.                 for (i = 0; i < n; i++) {
240.                     double t = *coefs++ / (exponents[i] * mult);
