bug#43700: 28.0.50; Crash creating a second frame

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: andrewjmoreton@gmail.com,  43700@debbugs.gnu.org
> Date: Sat, 03 Oct 2020 19:56:33 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> I can reproduce this segfault on Debian bullseye, too.
> >
> > Sure, it isn't w32-specific.
> >
> > Did I fix it now?
> 
> Yup, works now.

Thanks for testing.