Method ~CppCallable

tests/test_callbacks.cpp:134–134

    public:
        CppCallable() { track_default_created(this); }
        ~CppCallable() { track_destroyed(this); }
        CppCallable(const CppCallable &) { track_copy_created(this); }
        CppCallable(CppCallable &&) noexcept { track_move_created(this); }
        void operator()() {}