gdk/win32/gdkprivate-win32.h Drop global variable _gdk_root_window, just

gdk/win32/gdkprivate-win32.h Drop global variable _gdk_root_window, just

2005-03-16  Tor Lillqvist  <tml@novell.com>

	* gdk/win32/gdkprivate-win32.h
	* gdk/win32/*.c: Drop global variable _gdk_root_window, just call
	GetDesktopWindow(). Rename the GdkWindow* _gdk_parent_root to
	_gdk_root.

	* gdk/win32/gdkwindow-win32.h (GdkWindowImplWin32): Add
	toplevel_window_type field.

	* gdk/win32/gdkwindow-win32.c: As there is only one root
	window in GDK on Win32, we can compare directly to _gdk_root
	instead of checking the window type.
	(gdk_window_reparent): When reparenting a child of the desktop
	clear out the window decorations. Correspondingly, when
	reparenting to the desktop, add decorations. As in the X11
	backend, save the window type of a toplevel window when
	reparenting, in case it is reparented back to toplevel.