[master] 96b7bf526 Make the VTIM_format() test 64bit only

[Dridi Boukelmoune]

On Fri, Apr 30, 2021 at 8:26 PM Nils Goroll <nils.goroll at uplex.de> wrote:
>
>
> commit 96b7bf5265fe9a22f920fbe70d034ae57f0ae1c3
> Author: Nils Goroll <nils.goroll at uplex.de>
> Date:   Fri Apr 30 22:19:47 2021 +0200
>
>     Make the VTIM_format() test 64bit only
>
>     It is not obvious how we could trigger a gmtime_r() EOVERFLOW on 32bit
>
>     Thank you phk for pushing me back onto the right track at a late hour.
>
>     Ref #3308

Unironically caught by ubsan complaining about a float cast overflow.