libavcodec/wmadec.c:495: error: Uninitialized Value
  The value read from nb_coefs[_] was never initialized.

libavcodec/wmadec.c:495:13: 
493.             tindex = (ch == 1 && s->ms_stereo);
494.             memset(ptr, 0, s->block_len * sizeof(int16_t));
495.             ff_wma_run_level_decode(s->avctx, &s->gb, &s->coef_vlc[tindex],
                 ^
496.                   s->level_table[tindex], s->run_table[tindex],
497.                   0, ptr, 0, nb_coefs[ch],
