[gtk+] gdk_window_end_paint: Flush destination surface after paint

[Alexander Larsson <alexl src gnome org>]

commit 90555e06beb929c4491a58b6136aa9f0f8ae1fae
Author: Alexander Larsson <alexl redhat com>
Date:   Mon Nov 10 15:24:14 2014 +0100

    gdk_window_end_paint: Flush destination surface after paint
    
    It seems in cairo 1.14 we need this after having painted an image surface
    to a X11 window surface (i.e. with GDK_RENDERING=image).

 gdk/gdkwindow.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index be4f75c..ca7632a 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -3117,6 +3117,8 @@ gdk_window_end_paint (GdkWindow *window)
           cairo_paint (cr);
 
           cairo_destroy (cr);
+
+          cairo_surface_flush (surface);
         }
     }