[Perl/perl5] dd225a: util.c - assign HS_GETXSVERLEN() to var before assert

[Yves Orton via perl5-changes]

  Branch: refs/heads/yves/hpux_build_warning_suppression
  Home:   https://github.com/Perl/perl5
  Commit: dd225a58c3d5ec1d3ffe38e51efa043fe20673d4
      
https://github.com/Perl/perl5/commit/dd225a58c3d5ec1d3ffe38e51efa043fe20673d4
  Author: Yves Orton <demer...@gmail.com>
  Date:   2023-03-23 (Thu, 23 Mar 2023)

  Changed paths:
    M util.c

  Log Message:
  -----------
  util.c - assign HS_GETXSVERLEN() to var before assert

This makes it easier to see the value with gdb, and also avoids an
assignment in the if condition body.