Our apologies, there aren't that many of us. I see that you followed our documentation for submitting a patch:http://matplotlib.sourceforge.net/devel/gitwash/patching.html
Looking at your patch, I think it makes sense to do what you did. I only wonder if there are any other properties that should be taken care of here? Color? Linestyle? etc?
Note to self: we need to update the docs to describe how to do Pull Requests on GitHub.