Re: Fill column indicator functionality

[Eli Zaretskii]

> From: Óscar Fuentes <address@hidden>
> Date: Fri, 15 Mar 2019 23:52:52 +0100
> 
> emacs -Q
> 
> A graphical frame is shown with the toolbar. In *scratch*
> 
> M-x display-fill-column-indicator-mode
> 
> Now the part of the toolbar that is not covered by icons has white
> background.
> 
> Switch to *Messages*. The toolbar is shown normally. Switch back to
> *scratch*. The toolbar is partially white again.

I think the code which displays the indicator should not do that if
it->w->pseudo_window_p is non-zero.  IOW, if it->w->pseudo_window_p is
non-zero, extend_face_to_end_of_line should returns without producing
the glyphs for the stretch and the indicator character.