disallow changing cardtype cards into cards of self type

Ticket

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I think this should get caught now...

hmm, maybe not. (if there are no cards of type)

--Ethan McCutchen.....2013-03-21 16:20:57 +0000

worth testing?

--John Abbe.....2013-03-21 22:40:57 +0000

+discussed in support tickets