libavcodec/lpc.h:79: error: Uninitialized Value
  The value read from err was never initialized.

libavcodec/lpc.h:79:13: 
77.                 r -= lpc_last[j] * autoc[i-j-1];
78. 
79.             r /= err;
                ^
80.             err *= 1.0 - (r * r);
81.         }
