[Perl/perl5] d18980: fixup: cast U32 to UV

[Hugo van der Sanden via perl5-changes]

  Branch: refs/heads/hv/rewarn
  Home:   https://github.com/Perl/perl5
  Commit: d1898047ffd31b9c76e3045b84fbaa675e3badc3
      
https://github.com/Perl/perl5/commit/d1898047ffd31b9c76e3045b84fbaa675e3badc3
  Author: Hugo van der Sanden <h...@crypt.org>
  Date:   2022-04-10 (Sun, 10 Apr 2022)

  Changed paths:
    M regexec.c

  Log Message:
  -----------
  fixup: cast U32 to UV