libavcodec/ac3enc.c:212: error: Uninitialized Value
  The value read from rot[_] was never initialized.

libavcodec/ac3enc.c:212:9: 
210.     /* pre rotation */
211.     for(i=0;i<N/4;i++) {
212.         re = ((int)rot[2*i] - (int)rot[N-1-2*i]) >> 1;
             ^
213.         im = -((int)rot[N/2+2*i] - (int)rot[N/2-1-2*i]) >> 1;
214.         CMUL(x[i].re, x[i].im, re, im, -xcos1[i], xsin1[i]);
