[gtk+/client-side-windows: 76/284] Ref imp even in non-native windows and don't NULL out in destroy so that get_screen works after dest

[Alexander Larsson <alexl src gnome org>]

commit 5378324a1869fba390b25eb748b4afa45ae218f6
Author: Alexander Larsson <alexl redhat com>
Date:   Fri Dec 19 14:44:51 2008 +0100

    Ref imp even in non-native windows and don't NULL out in destroy so that get_screen works after destroy.
---
 gdk/gdkwindow.c |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index fe76ec7..524b3d7 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -871,7 +871,7 @@ gdk_window_new (GdkWindow     *parent,
     }
   else
     {
-      private->impl = private->parent->impl;
+      private->impl = g_object_ref (private->parent->impl);
     }
 
   recompute_visible_regions (private, TRUE, FALSE);
@@ -912,7 +912,8 @@ change_impl (GdkWindowObject *private,
   GdkDrawable *old_impl;
 
   old_impl = private->impl;
-  private->impl = new;
+  private->impl = g_object_ref (new);
+  g_object_unref (old_impl);
   
   for (l = private->children; l != NULL; l = l->next)
     {
@@ -1359,8 +1360,6 @@ _gdk_window_destroy_hierarchy (GdkWindow *window,
 	    {
 	      /* hide to make sure we repaint and break grabs */
 	      gdk_window_hide (window);
-	      /* NULL out impl so we don't double free it on finalize */
-	      private->impl = NULL;
 	    }
 
 	  private->state |= GDK_WINDOW_STATE_WITHDRAWN;