[gnome-shell] grabHelper: Correct typo preventing focus-window-changed disconnect

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

commit 5f995c64d4b9af9c2cede2bed530482128a04429
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Sat Feb 16 12:44:04 2013 -0500

    grabHelper: Correct typo preventing focus-window-changed disconnect
    
    While debugging, I found that the signal to focus-window-changed
    was never getting disconnected, making a call to ungrab every time
    the focus window changed, even if there were no focus grabs anymore.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=693975

 js/ui/grabHelper.js |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/grabHelper.js b/js/ui/grabHelper.js
index 0c0e190..058524a 100644
--- a/js/ui/grabHelper.js
+++ b/js/ui/grabHelper.js
@@ -232,7 +232,7 @@ const GrabHelper = new Lang.Class({
             this._keyFocusNotifyId = 0;
         }
 
-        if (!this._focusWindowChanged > 0) {
+        if (this._focusWindowChangedId > 0) {
             let metaDisplay = global.screen.get_display();
             metaDisplay.disconnect(this._focusWindowChangedId);
             this._focusWindowChangedId = 0;