bug#13476: 24.3.50; Reverting scroll-bar face customization has no effect

[Stephen Berman]

0. configure --without-toolkit-scroll-bars && make
1. emacs -Q
2. M-x customize-face RET scroll-bar RET, show all attributes, check the
   Foreground box , change its value to "green", and set for current
   session.
   Now the scroll bar is green.
3. Click the State button and select "Revert This Session's
   Customization".
=> The scroll bar is still green.
   Note that the Foreground box is unchecked.
4. Check the Foreground box.
   Note that its value is "black", though the scroll bar is green.

This pattern also obtains when starting Emacs without -Q, customizating
scroll-bar face, saving the change for future sessions, and then
reverting the customization.


In GNU Emacs 24.3.50.4 (x86_64-suse-linux-gnu, GTK+ Version 3.4.4)
 of 2013-01-17 on rosalinde
Bzr revision: 111542 michael.albinus@gmx.de-20130117090647-lb9mkbk6n8q142w5
Windowing system distributor `The X.Org Foundation', version 11.0.11203000
System Description:     openSUSE 12.2 (x86_64)

Configured using:
 `configure --without-toolkit-scroll-bars CFLAGS=-g3 -O0 --no-create
 --no-recursion'

Important settings:
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=local
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t