"Hide window content when moving" configuration results on XFWM4 repaint bug when restoring maximized windows dragging their title.

Submitted by spayder26

Assigned to Olivier Fourdan @olivier

Link to original bug (#7510)

Description

Steps to get this bug:

1. Go to xfwm4-settings dialog, and enable "Hide window content when moving" option on Advanced option's tab.
2. Then, using xfwm4 as window decorator, maximize any window.
3. Drag-and-drop window title to restore its size.
4. Eventually, you will see xfwm4's right and left decorations are not showing as they should, it doesn't happen everytime, but they use to.

Using ubuntu 10.10 with supported xfce 4.6 and unsupported 4.8

$xfwm4 --version
This is xfwm4 version 4.8.1 (revision 5b41921) for Xfce 4.8.0
	Released under the terms of the GNU General Public License.
	Compiled against GTK+-2.22.0, using GTK+-2.22.0.

	Build configuration and supported features:
	- Startup notification support:                 Yes
	- XSync support:                                Yes
	- Render support:                               Yes
	- Xrandr support:                               Yes
	- Embedded compositor:                          Yes
	- KDE systray proxy (deprecated):               No

Version: 4.8.0