libavcodec/qdm2.c:976: error: Uninitialized Value
  The value read from samples[_] was never initialized.

libavcodec/qdm2.c:976:33: 
974.                         if (q->nb_channels == 2) {
975.                             if (sign_bits[(j + k) / 8])
976.                                 q->sb_samples[1][j + k][sb] =
                                     ^
977.                                     q->tone_level[1][sb][(j + k) / 2] * -samples[k];
978.                             else
