[gnome-shell] layout: add back startingUp state variable

[Ray Strode <halfline src gnome org>]

commit 6484da26f00c2952eb04f8b3a0cea8df90aeed5b
Author: Ray Strode <rstrode redhat com>
Date:   Tue Feb 19 20:20:44 2013 -0500

    layout: add back startingUp state variable
    
    I dropped it on accident during last minute refactoring
    
    https://bugzilla.gnome.org/show_bug.cgi?id=694227

 js/ui/layout.js |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/js/ui/layout.js b/js/ui/layout.js
index 552e032..b03f906 100644
--- a/js/ui/layout.js
+++ b/js/ui/layout.js
@@ -140,6 +140,7 @@ const LayoutManager = new Lang.Class({
 
         this._trackedActors = [];
         this._isPopupWindowVisible = false;
+        this._startingUp = true;
 
         // Normally, the stage is always covered so Clutter doesn't need to clear
         // it; however it becomes visible during the startup animation
@@ -602,6 +603,7 @@ const LayoutManager = new Lang.Class({
         global.stage_input_mode = Shell.StageInputMode.NORMAL;
 
         this._consoleBackgroundGroup.destroy();
+        this._startingUp = false;
 
         if (Main.sessionMode.isGreeter)
             this._createSecondaryBackgrounds();