gdk: Make GdkWindow abstract

This way backend implementors get an error if they don't set
display_class->window_type to their subclass. And that's exactly what we
want.

diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index cb159e625c2bb017c2872b1f43498d2a0b59bc71..699d5dc3bdadd6e7d831f6ebae38a33b6d006f5f 100644 (file)
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -271,7 +271,7 @@ new_region_tag (void)
   return ++tag;
 }
 
-G_DEFINE_TYPE (GdkWindow, gdk_window, G_TYPE_OBJECT)
+G_DEFINE_ABSTRACT_TYPE (GdkWindow, gdk_window, G_TYPE_OBJECT)
 
 GType
 _gdk_paintable_get_type (void)