[gnome-shell] windowManager: Fix a warning

[Florian Müllner <fmuellner src gnome org>]

commit 32fdc22811299720ace16b5b3c06e21b06fad69b
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Jun 13 05:51:31 2017 +0200

    windowManager: Fix a warning
    
    The destroy effect currently relies on a monkey-patched property
    added from the map effect. However on X11 it is possible that we
    did no map animation for a window that is destroyed when the shell
    was restarted or had taken over from another WM. Just use the real
    MetaWindow property to avoid a warning in that case.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=781471

 js/ui/windowManager.js |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/windowManager.js b/js/ui/windowManager.js
index a89c726..f97ed76 100644
--- a/js/ui/windowManager.js
+++ b/js/ui/windowManager.js
@@ -1604,7 +1604,7 @@ const WindowManager = new Lang.Class({
             return;
         }
 
-        switch (actor._windowType) {
+        switch (actor.meta_window.window_type) {
         case Meta.WindowType.NORMAL:
             actor.set_pivot_point(0.5, 0.5);
             this._destroying.push(actor);