fix PAL8468. Change StartAndEndLength and Arithmethic1D computation on reversed edges
fix PAL8468. Change StartAndEndLength and Arithmethic1D computation on reversed edges

FedoraScientific/salome-smesh,FedoraScientific/salome-smesh,FedoraScientific/salome-smesh,FedoraScientific/salome-smesh