libavcodec/alsdec.c:745: error: Integer Overflow L2
  ([0, -1+max(1, `bd->opt_order`)] - 1):unsigned32 by call to `parcor_to_lpc`.

libavcodec/alsdec.c:738:14: Assignment
736.     // reconstruct all samples from residuals
737.     if (bd->ra_block) {
738.         for (smp = 0; smp < opt_order; smp++) {
                  ^
739.             y = 1 << 19;
740. 

libavcodec/alsdec.c:745:13: Call
743. 
744.             raw_samples[smp] -= y >> 20;
745.             parcor_to_lpc(smp, quant_cof, lpc_cof);
                 ^
746.         }
747.     } else {

libavcodec/alsdec.c:423:1: <LHS trace>
421. /** Converts PARCOR coefficient k to direct filter coefficient.
422.  */
423. static void parcor_to_lpc(unsigned int k, const int32_t *par, int32_t *cof)
     ^
424. {
425.     int i, j;

libavcodec/alsdec.c:423:1: Parameter `k`
  421. /** Converts PARCOR coefficient k to direct filter coefficient.
  422.  */
  423. static void parcor_to_lpc(unsigned int k, const int32_t *par, int32_t *cof)
       ^
  424. {
  425.     int i, j;

libavcodec/alsdec.c:427:17: Binary operation: ([0, -1+max(1, bd->opt_order)] - 1):unsigned32 by call to `parcor_to_lpc` 
  425.     int i, j;
  426. 
  427.     for (i = 0, j = k - 1; i < j; i++, j--) {
                       ^
  428.         int tmp1 = ((MUL64(par[k], cof[j]) + (1 << 19)) >> 20);
  429.         cof[j]  += ((MUL64(par[k], cof[i]) + (1 << 19)) >> 20);
