bug#28636: 27.0.50; Unable to load color "gtk_selection_bg_color" in 27.0.50

[Eli Zaretskii]

> From: Philipp Stephani <p.stephani2@gmail.com>
> Date: Fri, 29 Sep 2017 21:42:28 +0000
> Cc: rudalics@gmx.at, aplanas@gmail.com, 28636@debbugs.gnu.org
> 
>  Or maybe we should ask the GTK developers not to delete them because
>  we need them?
> 
> We could, but I don't think that will have a high probability of success. 
> They would rightly point out that we're
> doing it wrong.

The point is, our "wrong" way of doing things is likely to stay for a
long time the only way a GTK Emacs can be built, so unless there's a
possibility to use some other GTK functions to the same effect, it is
more probable to lose a GTK Emacs than to have a GTK rewrite of
Emacs.  Maybe if they understand this, they will reconsider.

> For the function in question, the definition is actually trivial, so we can 
> replace it with the definition for now to
> buy us some time. 

That's okay as well.