[gnome-shell] layout: Don't bother updating the regions in the greeter

[Jasper St. Pierre <jstpierre src gnome org>]

commit de3d3c15a5e03cc71292ee917b15736e07c1287b
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Tue Feb 19 21:06:33 2013 -0500

    layout: Don't bother updating the regions in the greeter
    
    The greeter is always full-screen, so this should never matter.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=694227

 js/ui/layout.js |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/js/ui/layout.js b/js/ui/layout.js
index f3cf728..f990853 100644
--- a/js/ui/layout.js
+++ b/js/ui/layout.js
@@ -829,6 +829,9 @@ const LayoutManager = new Lang.Class({
     },
 
     _queueUpdateRegions: function() {
+        if (Main.sessionMode.isGreeter)
+            return;
+
         if (!this._updateRegionIdle && !this._freezeUpdateCount)
             this._updateRegionIdle = Mainloop.idle_add(Lang.bind(this, this._updateRegions),
                                                        Meta.PRIORITY_BEFORE_REDRAW);