libavcodec/alsdec.c:880: error: Integer Overflow L2
  ([0, -1+max(1, `bd->opt_order`)] - 1):unsigned32 by call to `parcor_to_lpc`.

libavcodec/alsdec.c:873:14: Assignment
871.     // reconstruct all samples from residuals
872.     if (bd->ra_block) {
873.         for (smp = 0; smp < opt_order; smp++) {
                  ^
874.             y = 1 << 19;
875. 

libavcodec/alsdec.c:880:13: Call
878. 
879.             *raw_samples++ -= y >> 20;
880.             parcor_to_lpc(smp, quant_cof, lpc_cof);
                 ^
881.         }
882.     } else {

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);
