[gtk+] wayland: Keep the drag window alive longer

[Matthias Clasen <matthiasc src gnome org>]

commit f9e504d70e90686e32fd0c4b9ceab9f36a05ea53
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Jan 8 11:22:47 2016 -0500

    wayland: Keep the drag window alive longer
    
    We destroy the widget that is wrapped around the drag window
    when the object data on the drag context gets cleared. Destroying
    the window before that happens leads to unpleasantries. E.g. we may
    try to access the frame clock, which doesn't exist anymore, and
    things go downhill from there. So, keep the window alive for
    a little longer.

 gdk/wayland/gdkdnd-wayland.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/gdk/wayland/gdkdnd-wayland.c b/gdk/wayland/gdkdnd-wayland.c
index 36259e9..8eb8688 100644
--- a/gdk/wayland/gdkdnd-wayland.c
+++ b/gdk/wayland/gdkdnd-wayland.c
@@ -68,6 +68,7 @@ gdk_wayland_drag_context_finalize (GObject *object)
 {
   GdkWaylandDragContext *wayland_context = GDK_WAYLAND_DRAG_CONTEXT (object);
   GdkDragContext *context = GDK_DRAG_CONTEXT (object);
+  GdkWindow *dnd_window;
 
   contexts = g_list_remove (contexts, context);
 
@@ -86,10 +87,12 @@ gdk_wayland_drag_context_finalize (GObject *object)
   if (wayland_context->data_source)
     wl_data_source_destroy (wayland_context->data_source);
 
-  if (wayland_context->dnd_window)
-    gdk_window_destroy (wayland_context->dnd_window);
+  dnd_window = wayland_context->dnd_window;
 
   G_OBJECT_CLASS (gdk_wayland_drag_context_parent_class)->finalize (object);
+
+  if (dnd_window)
+    gdk_window_destroy (dnd_window);
 }
 
 void