libavcodec/wmadec.c:585: error: Uninitialized Value
  The value read from nb_coefs[_] was never initialized.

libavcodec/wmadec.c:585:13: 
583.             tindex = (ch == 1 && s->ms_stereo);
584.             memset(ptr, 0, s->block_len * sizeof(WMACoef));
585.             ff_wma_run_level_decode(s->avctx, &s->gb, &s->coef_vlc[tindex],
                 ^
586.                                     s->level_table[tindex], s->run_table[tindex],
587.                                     0, ptr, 0, nb_coefs[ch],
