bug#27427: 26.0.50; Native line numbers lead to display error in company-mode popup

[Eli Zaretskii]

> Date: Sat, 24 Jun 2017 10:47:28 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: alexanderm@web.de, 27427@debbugs.gnu.org
> 
> > > If providing such a facility would solve the problem, it should be
> > > easy to code.  E.g., we could have a display-line-numbers-disable
> > > property which a Lisp program could put on the first visible character
> > > of a visual line, and a non-nil value of that property would signal to
> > > the display engine not to produce the line-number glyphs for that
> > > visual line.  Would that be okay?
> > 
> > Should be fine, if we find no better choice. As long as that property 
> > can be set via an overlay.
> 
> OK, I will add that.

Now done.  Please see if this allows company-mode to fix its display
when line numbers are displayed.

Thanks.