bug#35409: 27.0.50; Emacs master can't be built in Win 10

[Eli Zaretskii]

> From: Shuguang Sun <shuguang79@qq.com>
> Cc: 35409@debbugs.gnu.org
> Date: Thu, 25 Apr 2019 09:16:07 +0800
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > Thanks, can you also show the results of xbacktrace?
> >
> > Also, when did you build the master branch before this time?
> >
> 
> This is my current Emacs:
> In GNU Emacs 27.0.50 (build 1, x86_64-w64-mingw32)
>  of 2019-04-14 built on RSHMX11052
> Repository revision: d209d646220bf1967e12d2de5c37b2be82e29835

I suspect the changes made in 23a82cb.  Can you try reverting that
commit?

> I'm on a trip. Will try to provide xbacktrace later.

Thanks.