bug#46036: fails do build on macos 10.7

[Eli Zaretskii]

> Cc: 46036@debbugs.gnu.org
> From: Riccardo Mottola <riccardo.mottola@libero.it>
> Date: Sat, 30 Jan 2021 19:32:17 +0100
> 
> > Is this change safe, or will we need another pretest to be sure?  I
> > thought we could next go straight to a release candidate.
> 
> to my knowledge it is safe: it is really equivalent code, the new syntax 
> is just a shortcut. A test on a newer MacOS is of course needed, I don't 
> have one.

Thanks.