bug#20182: 24.4.91; [GTK3] Vertical scroll bar is "indented" from right edge of frame

[N. Jackson]

Recipe:

    emacs -Q

Expected results:

- The Emacs frame has a vertical scroll bar displayed on the right with
  the right edge of the scroll bar at the right edge of the frame. That
  is, the right edge of the scroll bar is in the same pixel column as
  the right edge of the title bar and menu bar. [In other words the
  scroll bar and the title bar / menu bar intersect in the form an
  inverted L.]

Actual results:

- The Emacs frame has a vertical scroll bar displayed on the right, but
  the right edge of the scroll bar is "indented" from the right edge of
  the frame. That is, the right edge of the scroll bar is a few pixels
  to the left of (the pixel column of) the right edge of the title bar
  and menu bar. [In other words the scroll bar and the title bar / menu
  bar intersect in the form a T.]

Additional information:

- Other programs on my system display their scroll bar properly aligned.


===

In GNU Emacs 24.4.91.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.14.9)
 of 2015-03-10 on moondust
Windowing system distributor `Fedora Project', version 11.0.11603000
System Description:     Fedora release 21 (Twenty One)

Configured using:
 `configure --prefix=/home/nlj/local/ --enable-checking 'CFLAGS=-O0 -g3
 -ggdb''

Important settings:
  value of $LC_MONETARY: en_DK.utf8
  value of $LC_NUMERIC: en_DK.utf8
  value of $LC_TIME: en_DK.utf8
  value of $LANG: en_CA.utf8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Group

Minor modes in effect:
  gnus-undo-mode: t
  TeX-PDF-mode: t
  shell-dirtrack-mode: t
  recentf-mode: t
  display-battery-mode: t
  display-time-mode: t
  delete-selection-mode: t
  savehist-mode: t
  iswitchb-mode: t
  desktop-save-mode: t
  cua-mode: t
  tooltip-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  size-indication-mode: t
  column-number-mode: t
  line-number-mode: t
  global-visual-line-mode: t
  visual-line-mode: t
  transient-mark-mode: t

Recent messages:
Auto-saving...done
End of buffer [3 times]
Auto-saving...done
Mark set
Checking new news...
Reading active file from archive via nnfolder...done
Checking new news...done
Quit
byte-code: End of buffer [2 times]
<mouse-6> is undefined [3 times]

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