[cogl] Fix build on OSX

[Emmanuele Bassi <ebassi src gnome org>]

commit 3f561b1fbe0195b5b9c0cd248db3a5e9e48aedfd
Author: Emmanuele Bassi <ebassi linux intel com>
Date:   Wed Feb 15 14:55:31 2012 +0000

    Fix build on OSX
    
    A missing include prevents Cogl from building on OSX.
    
    Reviewed-by: Neil Roberts <neil linux intel com>

 cogl/cogl-onscreen-private.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/cogl/cogl-onscreen-private.h b/cogl/cogl-onscreen-private.h
index 1a624b5..a1322fd 100644
--- a/cogl/cogl-onscreen-private.h
+++ b/cogl/cogl-onscreen-private.h
@@ -25,6 +25,7 @@
 #define __COGL_ONSCREEN_PRIVATE_H
 
 #include "cogl-framebuffer-private.h"
+#include "cogl-queue.h"
 
 #include <glib.h>