fix all 2d examples including naca generated geometries

library/NekMeshUtils/2DGenerator/2DGenerator.cpp

library/NekMeshUtils/CADSystem/CADSurf.cpp

library/NekMeshUtils/CADSystem/CADSurf.h

library/NekMeshUtils/CADSystem/OCE/CADSurfOCE.cpp

library/NekMeshUtils/CADSystem/OCE/CADSystemOCE.cpp

library/NekMeshUtils/CADSystem/OCE/OpenCascade.h

library/NekMeshUtils/MeshElements/Element.h

library/NekMeshUtils/SurfaceMeshing/FaceMesh.cpp

library/NekMeshUtils/VolumeMeshing/BLMeshing/BLMesh.cpp

utilities/NekMesh/InputModules/InputMCF.cpp