Fixed breaking code when creating and destroying the editors

http://jsfiddle.net/Z4dBN/4/

This is the setup I've encountered the JS errors with and my patch will get rid of those errors. It's a quick patch and I haven't dug deeper into why errors happen, but I know for sure it's because I'm destroying and attaching editors very quickly. During this some events are lagging a bit behind and the editor.element reference is already gone when some of the events are triggered.

I don't know why the editor doesn't show up on the fiddle, it does on my computer, but I think this fiddle still points out the problem.

If you want me to change the patch so that the element reference is checked elsewhere, I'm more than happy to do so.