fix demo acrylic

Zhao Yuhang

2023-12-23 03c2a26820691493f5ebe86f64e0e360b0561642

 src/core/contexts/cocoawindowcontext_p.h

@@ -25,6 +25,8 @@

    protected:
        void winIdChanged() override;
        bool windowAttributeChanged(const QString &key, const QVariant &attribute,
                                    const QVariant &oldAttribute) override;

    protected:
        WId windowId = 0;