[clutter/wip/apocalypses/apocalypse-3: 19/35] canvas: Fix single header inclusion guard

[Emmanuele Bassi <ebassi src gnome org>]

commit 603db4036835493b695d680050dec0e751fe9f03
Author: Emmanuele Bassi <ebassi linux intel com>
Date:   Thu Mar 8 16:38:30 2012 +0000

    canvas: Fix single header inclusion guard

 clutter/clutter-canvas.h |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/clutter/clutter-canvas.h b/clutter/clutter-canvas.h
index 26cc8d3..c37d947 100644
--- a/clutter/clutter-canvas.h
+++ b/clutter/clutter-canvas.h
@@ -22,6 +22,10 @@
  *   Emmanuele Bassi <ebassi linux intel com>
  */
 
+#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
+#error "Only <clutter/clutter.h> can be included directly."
+#endif
+
 #ifndef __CLUTTER_CANVAS_H__
 #define __CLUTTER_CANVAS_H__