[clutter] GDK: fix build when the X11 backend is disabled

[Emilio Pozuelo Monfort <epm src gnome org>]

commit 5586b0deba9317a58cbc62caab295c613fdcfb44
Author: Emilio Pozuelo Monfort <pochu27 gmail com>
Date:   Tue Mar 12 14:11:35 2013 +0100

    GDK: fix build when the X11 backend is disabled
    
    https://bugzilla.gnome.org/show_bug.cgi?id=695710

 clutter/gdk/clutter-stage-gdk.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/clutter/gdk/clutter-stage-gdk.c b/clutter/gdk/clutter-stage-gdk.c
index 64e107f..828e2d0 100644
--- a/clutter/gdk/clutter-stage-gdk.c
+++ b/clutter/gdk/clutter-stage-gdk.c
@@ -64,7 +64,7 @@ G_DEFINE_TYPE_WITH_CODE (ClutterStageGdk,
                          G_IMPLEMENT_INTERFACE (CLUTTER_TYPE_STAGE_WINDOW,
                                                 clutter_stage_window_iface_init));
 
-#ifdef CLUTTER_WINDOWING_X11
+#ifdef GDK_WINDOWING_X11
 static void
 clutter_stage_gdk_update_foreign_event_mask (CoglOnscreen *onscreen,
                                             guint32 event_mask,