Lazy video filter fix for theora

This module provides an input filter for adding the onerror attribute on tags. This makes it possible to add links or messages to IE9 users that has not downloaded a correct codec for theora.

In other words: You don't have to remember to put it there yourself, even though you should (or if you already have a lot of nodes without the onerror attribute, like me, this can put it in there automatically).