Boolean values in actor functions are case sensitive

[Belmondo]

Kind of a conjecture but I think that whenever there is a truth value that is called in an actor function, ECWolf will return an error if it isn't all lowercase.

A_CustomPunch(1, False, CPF_ALWAYSPLAYSOUND) will give me an error but A_CustomPunch(1, false, CPF_ALWAYSPLAYSOUND) will not

[Braden Obrzut]

Fixed in changeset 366065b.