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/physics/box2d/wrap_MouseJoint.cpp

@@ -111,7 +111,7 @@ static const luaL_Reg w_MouseJoint_functions[] =
 
 extern "C" int luaopen_mousejoint(lua_State *L)
 {
-	return luax_register_type(L, MouseJoint::type, "MouseJoint", w_Joint_functions, w_MouseJoint_functions, nullptr);
+	return luax_register_type(L, MouseJoint::type, w_Joint_functions, w_MouseJoint_functions, nullptr);
 }
 
 } // box2d