My understanding from unc0rr is that as long as trunk and .17 are in sync, they maintain the protocol number.
Once they desync, trunk gets a new one
#include <QtGui/QApplication>
#include "mainwindow.h"
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}