[Perl/perl5] 48c6b5: class.c: Correct allocation of OP_ARGCHECK aux str...

[Paul Evans via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 48c6b5da1dc52d9264672b96e562cfea6ab197f5
      
https://github.com/Perl/perl5/commit/48c6b5da1dc52d9264672b96e562cfea6ab197f5
  Author: Paul "LeoNerd" Evans <leon...@leonerd.org.uk>
  Date:   2024-02-09 (Fri, 09 Feb 2024)

  Changed paths:
    M class.c

  Log Message:
  -----------
  class.c: Correct allocation of OP_ARGCHECK aux structure

The original code was wrong on two counts:
 * Using Newx() instead of PerlMemShared_malloc()
 * Creating a generic UNOP_AUX_item array instead of the special struct
   type