Try to fix displaced window content on 2% of startups.

Don't know why this seems to work.

lib/qtgame/qtgame.cpp

@@ -223,6 +223,7 @@ void QtGameWidget::initializeGL()
 QtGameWidget::QtGameWidget(QSize curResolution, const QGLFormat &format, QWidget *parent, Qt::WindowFlags f, const QGLWidget *shareWidget)
 	: QGLWidget(adjustFormat(format), parent, shareWidget, f), mOriginalResolution(0, 0), mMinimumSize(0, 0)
 {
+	QGLWidget::setFixedSize(curResolution);  // Don't know whether this needs to be done here, but if not, the window contents are displaced 2% of the time.
 	mWantedSize = curResolution;
 	mResolutionChanged = false;
 	updateResolutionList();