Automatically deduce the type in luax_checktype, luax_getmodule, luax_optmodule and luax_totype

--HG--
branch : dynamiccore2

src/modules/physics/box2d/wrap_ChainShape.cpp

@@ -31,7 +31,7 @@ namespace box2d
 
 ChainShape *luax_checkchainshape(lua_State *L, int idx)
 {
-	return luax_checktype<ChainShape>(L, idx, ChainShape::type);
+	return luax_checktype<ChainShape>(L, idx);
 }
 
 int w_ChainShape_setNextVertex(lua_State *L)