Viewfield breaks when argument contains a comma

In my case, I'm using viewfield with an argument equal to the title of a node. As it explode()'s on commas, any titles with commas can't be selected. I've attached a small patch which changes the seperator to '\,', which I figure is far less likely to be used. It's not a real solution, but it should help for anyone with this problem.

It would probably be best to change the arguments field to be multiple text boxes instead, but that would be more work :).

--Andrew