libavcodec/alsdec.c:884: error: Integer Overflow L2
  ([0, -1+max(1, `bd->opt_order`)] - 1):unsigned32 by call to `parcor_to_lpc`.

libavcodec/alsdec.c:883:14: Assignment
881.         }
882.     } else {
883.         for (k = 0; k < opt_order; k++)
                  ^
884.             parcor_to_lpc(k, quant_cof, lpc_cof);
885. 

libavcodec/alsdec.c:884:13: Call
882.     } else {
883.         for (k = 0; k < opt_order; k++)
884.             parcor_to_lpc(k, quant_cof, lpc_cof);
                 ^
885. 
886.         // store previous samples in case that they have to be altered

libavcodec/alsdec.c:477:1: <LHS trace>
475. /** Convert PARCOR coefficient k to direct filter coefficient.
476.  */
477. static void parcor_to_lpc(unsigned int k, const int32_t *par, int32_t *cof)
     ^
478. {
479.     int i, j;

libavcodec/alsdec.c:477:1: Parameter `k`
  475. /** Convert PARCOR coefficient k to direct filter coefficient.
  476.  */
  477. static void parcor_to_lpc(unsigned int k, const int32_t *par, int32_t *cof)
       ^
  478. {
  479.     int i, j;

libavcodec/alsdec.c:481:17: Binary operation: ([0, -1+max(1, bd->opt_order)] - 1):unsigned32 by call to `parcor_to_lpc` 
  479.     int i, j;
  480. 
  481.     for (i = 0, j = k - 1; i < j; i++, j--) {
                       ^
  482.         int tmp1 = ((MUL64(par[k], cof[j]) + (1 << 19)) >> 20);
  483.         cof[j]  += ((MUL64(par[k], cof[i]) + (1 << 19)) >> 20);
