libavcodec/ac3dec.c:386: error: Uninitialized Value
  The value read from dexp[_] was never initialized.

libavcodec/ac3dec.c:386:9: 
384.     prevexp = absexp;
385.     for (i = 0, j = 0; i < ngrps * 3; i++) {
386.         prevexp += dexp[i] - 2;
             ^
387.         if (prevexp > 24U)
388.             return -1;
