Check if we have a scheduler

src/ITA/simulation_scheduler/room_acoustics/worker_interface.cpp

@@ -14,7 +14,8 @@ namespace ITA
 			IWorkerInterface::IWorkerInterface ( ISchedulerInterface* pParent ) :
 				m_pParentScheduler ( pParent )
 			{
-				m_eFieldOfDuty = pParent->getFieldOfDuty();
+				if ( pParent != nullptr)
+					m_eFieldOfDuty = pParent->getFieldOfDuty();
 			}
 
 			void CWorkerFactory::registerWorker ( const std::string& type, CreateCallback createFunction )