add missing win32 constant for old win sdk

Zhao Yuhang

2025-03-11 c00e986f38dbc4843d92cc76a385f826658c1e03

 src/core/qwindowkit_windows.h

@@ -5,6 +5,14 @@
#ifndef QWINDOWKIT_WINDOWS_H
#define QWINDOWKIT_WINDOWS_H

#ifndef _USER32_
#  define _USER32_
#endif

#ifndef _DWMAPI_
#  define _DWMAPI_
#endif

#include <QtCore/qt_windows.h>
#include <QtCore/qglobal.h>