[gtk+/gtk-2-18] Flush outstanding stuff when clearing directly on a window

[Alexander Larsson <alexl src gnome org>]

commit a68e02b7c75bc69f6fa8281de72b9d5ba91e050c
Author: Alexander Larsson <alexl redhat com>
Date:   Tue Nov 3 14:39:50 2009 +0100

    Flush outstanding stuff when clearing directly on a window
    
    Clearing will directly modify the contents of the window, so we need
    to flush any outstanding moves or double-buffering.
    (cherry picked from commit 8c1ea38d84468a9098e88573ba714cbbe3c80ed5)

 gdk/gdkwindow.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 2bb5551..d5b427f 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -4431,6 +4431,10 @@ gdk_window_clear_region_internal (GdkWindow *window,
 	  gdk_region_intersect (copy,
 				private->clip_region_with_children);
 
+
+	  /* Drawing directly to the window, flush anything outstanding to
+	     guarantee ordering. */
+	  gdk_window_flush (window);
 	  impl_iface->clear_region (window, copy, send_expose);
 
 	  gdk_region_destroy (copy);