libavcodec/aacsbr.c:716: error: Uninitialized Value
  The value read from num_rel_lead was never initialized.

libavcodec/aacsbr.c:716:21: 
714.         int temp = (abs_bord_trail + (ch_data->bs_num_env[1] >> 1)) /
715.                    ch_data->bs_num_env[1];
716.         for (i = 0; i < num_rel_lead; i++)
                         ^
717.             ch_data->t_env[i + 1] = ch_data->t_env[i] + temp;
718.     } else if (ch_data->bs_frame_class > 1) { // VARFIX or VARVAR
