From a96716c2d8021564dbe8b2c54b35bd25466f0c0f Mon Sep 17 00:00:00 2001
From: Kris Maglione <maglione.k@gmail.com>
Date: Tue, 4 Oct 2011 07:02:51 -0400
Subject: [PATCH] Fix caret mode bug.

---
 common/content/editor.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/common/content/editor.js b/common/content/editor.js
index 8735344f..7e83fd65 100644
--- a/common/content/editor.js
+++ b/common/content/editor.js
@@ -22,7 +22,7 @@ var Editor = Module("editor", {
                     return elem.inputField || elem;
 
                 let win = document.commandDispatcher.focusedWindow;
-                return DOM(win).isEditable && win;
+                return DOM(win).isEditable && win || null;
             });
     },