[gnome-shell] main: Fix typo

[Florian MÃllner <fmuellner src gnome org>]

commit 67c7abaac3d8b75a5127e52a1f1167052b9dd25b
Author: Florian MÃllner <fmuellner gnome org>
Date:   Tue Feb 5 20:41:00 2013 +0100

    main: Fix typo
    
    This fixes a regression from commit fcc32fca.

 js/ui/main.js |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/main.js b/js/ui/main.js
index 5a6ab0b..a3db593 100644
--- a/js/ui/main.js
+++ b/js/ui/main.js
@@ -381,7 +381,7 @@ function _nWorkspacesChanged() {
 }
 
 function _loadDefaultStylesheet() {
-    if (!Main.sessionMode.isPrimary)
+    if (!sessionMode.isPrimary)
         return;
 
     let stylesheet = global.datadir + '/theme/' + sessionMode.stylesheetName;