Method on_count_changed

library/PluginManager.cpp:176–181

    }

    void on_count_changed(int new_cnt, int delta) {
        RefAutoinc lock(handler.owner->access);
        count = new_cnt;
        if (event)
            event->on_count_changed(new_cnt, delta);
    }
    void on_invoked(lua_State *state, int nargs, bool from_c) {
        RefAutoinc lock(handler.owner->access);
        if (event)