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:877:14: Assignment
875.     // reconstruct all samples from residuals
876.     if (bd->ra_block) {
877.         for (smp = 0; smp < opt_order; smp++) {
                  ^
878.             y = 1 << 19;
879. 

libavcodec/alsdec.c:884:13: Call
882. 
883.             *raw_samples++ -= y >> 20;
884.             parcor_to_lpc(smp, quant_cof, lpc_cof);
                 ^
885.         }
886.     } else {

libavcodec/alsdec.c:481:1: <LHS trace>
479. /** Convert PARCOR coefficient k to direct filter coefficient.
480.  */
481. static void parcor_to_lpc(unsigned int k, const int32_t *par, int32_t *cof)
     ^
482. {
483.     int i, j;

libavcodec/alsdec.c:481:1: Parameter `k`
  479. /** Convert PARCOR coefficient k to direct filter coefficient.
  480.  */
  481. static void parcor_to_lpc(unsigned int k, const int32_t *par, int32_t *cof)
       ^
  482. {
  483.     int i, j;

libavcodec/alsdec.c:485:17: Binary operation: ([0, -1+max(1, *bd->opt_order)] - 1):unsigned32 by call to `parcor_to_lpc` 
  483.     int i, j;
  484. 
  485.     for (i = 0, j = k - 1; i < j; i++, j--) {
                       ^
  486.         int tmp1 = ((MUL64(par[k], cof[j]) + (1 << 19)) >> 20);
  487.         cof[j]  += ((MUL64(par[k], cof[i]) + (1 << 19)) >> 20);
