lupdate -pro project_files/hedgewars.pro -no-obsolete
yes, I think the lupdate commits should be separate and should contain the -no-obsole flag
#include <QApplication>
#include "mainform.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MyWindow *mainWin = new MyWindow;
mainWin->show();
return app.exec();
}