libavcodec/ac3enc.c:337: error: Uninitialized Value
  The value read from rot[_] was never initialized.

libavcodec/ac3enc.c:337:9: 
335.     /* pre rotation */
336.     for (i = 0; i < MDCT_SAMPLES/4; i++) {
337.         re =  ((int)rot[               2*i] - (int)rot[MDCT_SAMPLES  -1-2*i]) >> 1;
             ^
338.         im = -((int)rot[MDCT_SAMPLES/2+2*i] - (int)rot[MDCT_SAMPLES/2-1-2*i]) >> 1;
339.         CMUL(x[i].re, x[i].im, re, im, -xcos1[i], xsin1[i]);
