Ensure memory is handled properly with userdata

tests/integration/UserData.cpp

@@ -56,8 +56,10 @@ end
     auto obj = new UserDataTestObject();
     auto parameter = new UserDataValue(HashedString::ConstHash("testObject"), obj);
     script->CallFunction("testFunc", {parameter});
-    REQUIRE(obj->foo == 5000);
     delete script;
+    REQUIRE(obj->foo == 5000);
+    delete obj;
+    delete parameter;
 }