"operator=" in QGeoManeuver class will cause those two objects use one memory

Deep copy does not occur when datamembers of QGeoManeuver class is modified via "ver" object.

QGeoManeuver ver;
QGeoManeuver ver1(ver);
QGeoManeuver ver2;
ver2 = ver;
ver.setPosition(QGeoCoordinate(10.0,10,0));
//below lines will return true
QVERIFY(ver == ver2);
QVERIFY(ver1 == ver2);