if a shape to be rotated is a vertex, and it is located ON the Revolution Axis, then the algorithm builds a circle with null radius.  Incorrect, visualization of such shape fails.  This case is checked and revolution is not done in this case.
if a shape to be rotated is a vertex, and it is located ON the Revolution Axis, then the algorithm builds a circle with null radius.  Incorrect, visualization of such shape fails.  This case is checked and revolution is not done in this case.

FedoraScientific/salome-geom,FedoraScientific/salome-geom,FedoraScientific/salome-geom,FedoraScientific/salome-geom