[gtk+] broadway: fix a build warning

[Cosimo Cecchi <cosimoc src gnome org>]

commit 69b9794d9e1362c68cffb8eba9777681d6b12d65
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Wed Mar 16 10:48:24 2011 -0400

    broadway: fix a build warning

 gdk/broadway/gdkwindow-broadway.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gdk/broadway/gdkwindow-broadway.c b/gdk/broadway/gdkwindow-broadway.c
index b986697..3518d40 100644
--- a/gdk/broadway/gdkwindow-broadway.c
+++ b/gdk/broadway/gdkwindow-broadway.c
@@ -819,7 +819,7 @@ gdk_window_broadway_get_geometry (GdkWindow *window,
 {
   GdkWindowImplBroadway *impl;
 
-  g_return_val_if_fail (GDK_IS_WINDOW (window), NULL);
+  g_return_if_fail (GDK_IS_WINDOW (window));
 
   impl = GDK_WINDOW_IMPL_BROADWAY (window->impl);