Applied patch from maemo-gtk that addresses many issues wrt display

Applied patch from maemo-gtk that addresses many issues wrt display

2005-11-10  Michael Natterer  <mitch@imendio.com>

	Applied patch from maemo-gtk that addresses many issues wrt
	display migration and display closing (bug #85715).

	* gdk/gdkdisplay.c (gdk_display_dispose): don't just set the
	default display to NULL when it's closed. Instead set the most
	recently opened display as new default (if one exists).

	* gdk/gdkpango.c (on_renderer_display_closed): fixed signature
	of this callback.

	* gdk/gdkscreen.c (gdk_screen_dispose): check if the GCs still
	exist before unrefing them.

	* gdk/gdkwindow.c (_gdk_window_destroy_hierarchy): if the screen
	is closed, allow destruction of the root window.

	* gdk/x11/gdkdisplay-x11.c: moved some stuff from finalize() to
	dispose(), free stuff that was leaked before.

	* gdk/x11/gdkevents-x11.c (_gdk_x11_events_uninit_screen): check if
	the xsettings_client still exists before destroying it.

	* gdk/x11/gdkkeys-x11.c: added finalization and free the allocated
	X resources.

	* gdk/x11/gdkpixmap-x11.c: moved stuff from finalize() to new
	dispose() implementation.

	* gdk/x11/gdkscreen-x11.c: moved stuff from finalize() to
	dispose() and check if it still exists before unrefing it. Set
	their pointers to NULL/None *after* upchaining in dispose(),
	because X11 implementations of members of the parent class still
	need them for their own destruction.

	* gdk/x11/gdkvisual-x11.c: removed finalize() implementation which
	was g_error()ing when finalizing a visual.

	* gtk/gtkclipboard.c (gtk_clipboard_finalize): don't use
	get_clipboard_widget() because it would create the widget if it
	doesn't exist. Use g_object_get_data() directly instead.

	* gtk/gtktextdisplay.c (on_renderer_display_closed): fixed signature
	of this callback.