Fix unit test dirty bit

src/MissionManager/SurveyMissionItemTest.cc

@@ -34,6 +34,7 @@ void SurveyMissionItemTest::init(void)
     _offlineVehicle = new Vehicle(MAV_AUTOPILOT_PX4, MAV_TYPE_QUADROTOR, qgcApp()->toolbox()->firmwarePluginManager(), this);
     _surveyItem = new SurveyMissionItem(_offlineVehicle, this);
     _surveyItem->setTurnaroundDist(0);  // Unit test written for no turnaround distance
+    _surveyItem->setDirty(false);
     _mapPolygon = _surveyItem->mapPolygon();
 
     // It's important to check that the right signals are emitted at the right time since that drives ui change.