[Perl/perl5] 543a84: gh17824: zero curlocales[]

[Hugo van der Sanden via perl5-changes]

  Branch: refs/heads/gh17824
  Home:   https://github.com/Perl/perl5
  Commit: 543a843b5a5feefefae2cae19d5432101b05d235
      
https://github.com/Perl/perl5/commit/543a843b5a5feefefae2cae19d5432101b05d235
  Author: Hugo van der Sanden <h...@crypt.org>
  Date:   2021-05-22 (Sat, 22 May 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  gh17824: zero curlocales[]

Static analysis tools such as Coverity and clang report that we can
otherwise end up reading uninitialized data, and inspection agrees.