[Perl/perl5] 9e831d: pp_sys.c: add casts to silence Win32 build warnings

[Yves Orton]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 9e831ddf560754471ff3a651fa851b7941db927a
      
https://github.com/Perl/perl5/commit/9e831ddf560754471ff3a651fa851b7941db927a
  Author: Yves Orton <demer...@gmail.com>
  Date:   2020-02-08 (Sat, 08 Feb 2020)

  Changed paths:
    M pp_sys.c

  Log Message:
  -----------
  pp_sys.c: add casts to silence Win32 build warnings