[gtk+/client-side-windows] Update GdkOffscreenWindow to new draw_drawable prototype

[Alexander Larsson <alexl src gnome org>]

commit cd7afc14fdf636bd0b482b1c7f0b2dd0afb534cd
Author: Alexander Larsson <alexl redhat com>
Date:   Thu Jun 4 12:48:23 2009 +0200

    Update GdkOffscreenWindow to new draw_drawable prototype
    
    All rendering of drawables on offscreen was broken due to this change which
    had not been implemented fully in offscreen windows.
---
 gdk/gdkoffscreenwindow.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/gdk/gdkoffscreenwindow.c b/gdk/gdkoffscreenwindow.c
index 5791eac..efdfcd9 100644
--- a/gdk/gdkoffscreenwindow.c
+++ b/gdk/gdkoffscreenwindow.c
@@ -281,6 +281,7 @@ static void
 gdk_offscreen_window_draw_drawable (GdkDrawable *drawable,
 				    GdkGC       *gc,
 				    GdkPixmap   *src,
+				    GdkDrawable *original_src,
 				    gint         xsrc,
 				    gint         ysrc,
 				    gint         xdest,