[gnome-shell] status/a11y: Fix typo

[Carlos Garnacho <carlosg src gnome org>]

commit 35d0ba4454ff1146b00072ae09163148b12d8fcd
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Mar 16 01:30:49 2017 +0100

    status/a11y: Fix typo
    
    The idle ID being set and being checked didn't quite match up.

 js/ui/status/accessibility.js |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/status/accessibility.js b/js/ui/status/accessibility.js
index 4ecbc8d..6aa1064 100644
--- a/js/ui/status/accessibility.js
+++ b/js/ui/status/accessibility.js
@@ -102,8 +102,8 @@ const ATIndicator = new Lang.Class({
         if (this._syncMenuVisibilityIdle)
             return;
 
-        this._syncMenuVisbilityIdle = Mainloop.idle_add(Lang.bind(this, this._syncMenuVisibility));
-        GLib.Source.set_name_by_id(this._syncMenuVisbilityIdle, '[gnome-shell] this._syncMenuVisibility');
+        this._syncMenuVisibilityIdle = Mainloop.idle_add(Lang.bind(this, this._syncMenuVisibility));
+        GLib.Source.set_name_by_id(this._syncMenuVisibilityIdle, '[gnome-shell] this._syncMenuVisibility');
     },
 
     _buildItemExtended: function(string, initial_value, writable, on_set) {