[clutter] Fix compilation

[Emmanuele Bassi <ebassi src gnome org>]

commit a1ec559d14a5baafc45e663e8d62d2109d8a8e90
Author: Emmanuele Bassi <ebassi linux intel com>
Date:   Thu Mar 1 15:07:05 2012 +0000

    Fix compilation
    
    Hide a symbol if we're not compiling with Wayland compositor support.

 clutter/clutter-backend.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/clutter/clutter-backend.c b/clutter/clutter-backend.c
index 6142af8..b50154a 100644
--- a/clutter/clutter-backend.c
+++ b/clutter/clutter-backend.c
@@ -269,11 +269,13 @@ clutter_backend_real_create_context (ClutterBackend  *backend,
   if (backend->cogl_renderer == NULL)
     goto error;
 
+#ifdef HAVE_CLUTTER_WAYLAND_COMPOSITOR
   /* If the application is trying to act as a Wayland compositor then
      it needs to have an EGL-based renderer backend */
   if (_wayland_compositor_display)
     cogl_renderer_add_constraint (backend->cogl_renderer,
                                   COGL_RENDERER_CONSTRAINT_USES_EGL);
+#endif
 
   CLUTTER_NOTE (BACKEND, "Connecting the renderer");
   if (!cogl_renderer_connect (backend->cogl_renderer, &internal_error))