[gnome-shell] PopupMenuManager: don't throw exceptions if don't have focus

[Giovanni Campagna <gcampagna src gnome org>]

commit b9cb37da5eacd7fed76261a9295c189aba6e0ab9
Author: Giovanni Campagna <gcampagna src gnome org>
Date:   Tue Feb 22 20:56:23 2011 +0100

    PopupMenuManager: don't throw exceptions if don't have focus
    
    stage.key_focus can be null, but passing null to _activeMenuContains
    throws (from gjs marshalling). In that case, just assume it returned
    false.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=642976

 js/ui/popupMenu.js |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/popupMenu.js b/js/ui/popupMenu.js
index 0a26ba7..9919922 100644
--- a/js/ui/popupMenu.js
+++ b/js/ui/popupMenu.js
@@ -1252,7 +1252,7 @@ PopupMenuManager.prototype = {
                 menu.sourceActor.grab_key_focus();
         } else if (menu == this._activeMenu) {
             let focus = global.stage.key_focus;
-            let fromActive = this._activeMenuContains(focus);
+            let fromActive = focus && this._activeMenuContains(focus);
 
             if (this.grabbed)
                 this._ungrab();