add missing win32 constant for old win sdk

Zhao Yuhang

2025-03-11 c00e986f38dbc4843d92cc76a385f826658c1e03

 src/core/contexts/abstractwindowcontext.cpp

@@ -230,17 +230,15 @@
        if (m_windowHandle) {
            removeEventFilter(m_windowHandle);
        }

        auto oldWindowHandle = m_windowHandle.data();
        m_windowHandle = m_delegate->hostWindow(m_host);
        if (m_windowHandle) {
            m_windowHandle->installEventFilter(this);
        }

        if (oldWinId != m_windowId) {
            winIdChanged(m_windowId, oldWinId);

            if (m_windowId) {
                // Installing twice has no side-effect.
                m_windowHandle->installEventFilter(this);

                // Refresh window attributes
                for (auto it = m_windowAttributesOrder.begin();
                     it != m_windowAttributesOrder.end();) {