Don't leak visible_region. Use visible_region instead of region.

Don't leak visible_region. Use visible_region instead of region.

2001-01-22    <alexl@redhat.com>

	* gdk/gdkwindow.c (gdk_window_invalidate_region):
	Don't leak visible_region. Use visible_region instead of region.

	* gdk/linux-fb/gdkwindow-fb.c (gdk_window_new):
	Don't do extra gdk_drawable_ref(). This is not X.
	(gdk_fb_window_find_focus, gdk_fb_change_focus): make sure
	gdk_fb_focused_window is ref:ed.
	(gdk_fb_window_send_crossing_events): Watch out for destroyed
	windows.