Make love::Type handle type names

TODO: Fix undefined behaviour in luax_register_type, you can't use a va_list after a reference type

--HG--
branch : dynamiccore2

src/modules/thread/threads.cpp

@@ -74,7 +74,7 @@ void EmptyLock::setLock(Mutex &m)
 	mutex = &m;
 }
 
-love::Type Threadable::type(&Object::type);
+love::Type Threadable::type("Threadable", &Object::type);
 
 Threadable::Threadable()
 {