bug#37415: Asserting failure setting frame parameters to non-fixnum values in early-init.el

[Eli Zaretskii]

> Cc: lekktu@gmail.com, 37415@debbugs.gnu.org
> From: martin rudalics <rudalics@gmx.at>
> Date: Thu, 19 Sep 2019 10:17:42 +0200
> 
>  > Feel free to fix it, if it's practical.  I chimed in after hearing
>  > nothing from you for a few days ;-)
> 
> Initially, I couldn't reproduce it (and still can't on Debian although
> setting it doesn't seem to have any effect there).

Try on MS-Windows, it's trivial there.

> But even if we cannot fix the behavior we have to avoid the crash.

That was my purpose when I proposed to signal an error in this case.