libavcodec/ac3.c:186: error: Uninitialized Value
  The value read from excite[_] was never initialized.

libavcodec/ac3.c:186:13: 
184.         int tmp = s->db_per_bit - band_psd[band];
185.         if (tmp > 0) {
186.             excite[band] += tmp >> 2;
                 ^
187.         }
188.         mask[band] = FFMAX(ff_ac3_hearing_threshold_tab[band >> s->sr_shift][s->sr_code], excite[band]);
