[gtk] window: Unroot with old display

[Timm Bäder <baedert src gnome org>]

commit b2d639b6d90982208589b9f0a7b8ba768275fff6
Author: Timm Bäder <mail baedert org>
Date:   Sat Jul 27 07:57:06 2019 +0200

    window: Unroot with old display
    
    Things might rely on the old display being set while unrooting.
    
    Fixes #2052

 gtk/gtkwindow.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index 5061f7e648..1ee033f193 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -8087,9 +8087,10 @@ gtk_window_set_display (GtkWindow  *window,
                     "notify::gtk-application-prefer-dark-theme",
                     G_CALLBACK (gtk_window_on_theme_variant_changed), window);
 #endif
-  priv->display = display;
 
   gtk_widget_unroot (widget);
+  priv->display = display;
+
   gtk_widget_root (widget);
 
   g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_DISPLAY]);