add missing win32 constant for old win sdk

Zhao Yuhang

2025-03-11 c00e986f38dbc4843d92cc76a385f826658c1e03

 src/widgets/widgetwindowagent.cpp

@@ -61,7 +61,7 @@
        w->setAttribute(Qt::WA_DontCreateNativeAncestors);
        // Make sure the native window handle is actually created before we apply
        // various hooks.
        w->setAttribute(Qt::WA_NativeWindow);
        //w->setAttribute(Qt::WA_NativeWindow); // ### FIXME: Check

        d->setup(w, new WidgetItemDelegate());
        d->hostWidget = w;