bug#16284: 24.3.50; blank column shown with scroll bar configuration changes

[Eli Zaretskii]

> Date: Mon, 30 Dec 2013 10:15:15 +0100
> From: martin rudalics <rudalics@gmx.at>
> Cc: 16284@debbugs.gnu.org
> 
> > Steps to reproduce:
> > 
> > 1. $ emacs -Q -D &
> > 2. M-x scroll-bar-mode RET
> > 3. M-x scroll-bar-mode RET
> > 
> > Then you'll see a blank column to the right of the scroll bar.
> 
> Hopefully fixed now.  Please try again.

Emacs still thinks the scroll bars are displayed when it is started
with -D: step 2 says "Scroll-Bar mode disabled", although the scroll
bar was not shown before that.