Fix typo in cmake config

Sine Striker

2024-02-23 fa380df5aa3a9c302760be3903eeebb6d866d8ee

 examples/mainwindow/main.cpp

@@ -33,7 +33,9 @@
    MainWindow w;
    w.show();

#if 0
    QMainWindow w2;
    w2.show();
#endif
    return a.exec();
}