bug#9722: list-colors-duplicates does not exclude enough colors on Windows

[Eli Zaretskii]

> From: Juanma Barranquero <lekktu@gmail.com>
> Date: Mon, 17 Oct 2011 14:00:54 +0200
> Cc: 9722@debbugs.gnu.org
> 
> On Tue, Oct 11, 2011 at 22:54, Juanma Barranquero <lekktu@gmail.com> wrote:
> 
> > Or am I missing something?
> 
> Ping?

Sorry.

It doesn't sound TRT to me to use w32-default-color-map for the
purpose of retaining some special colors in the list.  I think it
would be cleaner to have a separate (much shorter) list of colors that
should not be removed even if their RGB values are identical to other
colors already present in the list produced by defined-colors.

If you agree, let's create such a list, put it on w32-fns.el, and use
it in facemenu.el.

OK?