[gtk+/native-layout] Some fixes in gtkoffscreenwindow.h

[Tristan Van Berkom <tvb src gnome org>]

commit 27f81d891809d001d38e558e78b984376e6b5aa7
Author: Michael Natterer <mitch gimp org>
Date:   Wed Jan 13 22:23:03 2010 +0100

    Some fixes in gtkoffscreenwindow.h
    
    - use (void) not () for void functions
    - disallow individual inclusion unconditionally

 gtk/gtkoffscreenwindow.h |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtkoffscreenwindow.h b/gtk/gtkoffscreenwindow.h
index 518b8df..a706e67 100644
--- a/gtk/gtkoffscreenwindow.h
+++ b/gtk/gtkoffscreenwindow.h
@@ -18,7 +18,7 @@
  *          Alexander Larsson <alexl redhat com>
  */
 
-#if defined(GTK_DISABLE_SINGLE_INCLUDES) && !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
+#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
 #error "Only <gtk/gtk.h> can be included directly."
 #endif
 
@@ -49,9 +49,9 @@ struct _GtkOffscreenWindowClass
   GtkWindowClass parent_class;
 };
 
-GType      gtk_offscreen_window_get_type () G_GNUC_CONST;
+GType      gtk_offscreen_window_get_type   (void) G_GNUC_CONST;
 
-GtkWidget *gtk_offscreen_window_new ();
+GtkWidget *gtk_offscreen_window_new        (void);
 GdkPixmap *gtk_offscreen_window_get_pixmap (GtkOffscreenWindow *offscreen);
 GdkPixbuf *gtk_offscreen_window_get_pixbuf (GtkOffscreenWindow *offscreen);