bug#65191: 29.1; -ms and -cr CL options don't work

[Eli Zaretskii]

> From: Peter Mao <peter.mao@gmail.com>
> Date: Wed, 9 Aug 2023 20:00:43 -0700
> 
> Recipe:
> emacs-29.1 -Q -ms red -cr green &
> 
> - Cursor is not green; mouse pointer is not red.  "-cr" definitely worked in
> v28.2, but "-ms" did not.
> - This problem does not occur on MacOS -- both "-cr" and "-ms" work properly 
> (config follows Ubuntu
> config below)
> - On Ubuntu, "-cr" worked in earlier versions of Emacs, but "-ms" did not.
> - `set-cursor-color` works properly in all cases
> - `set-mouse-color` does not work on Ubuntu, but it does work on OSX.
> - Emacs did not crash.

This works for me on MS-Windows (although the Windows build currently
doesn't support -ms).

Po Lu, can you please see why this doesn't work on X with GTK?