fix compile error on win

Zhao Yuhang

2023-12-22 0cedc474f38dca024f77ebf1d7ac5bf22c19744a

 src/core/windowitemdelegate.cpp

@@ -6,6 +6,8 @@

    WindowItemDelegate::~WindowItemDelegate() = default;

    void WindowItemDelegate::resetQtGrabbedControl() const {}
    void WindowItemDelegate::resetQtGrabbedControl(QObject *host) const {
        Q_UNUSED(host);
    }

}