these 3 functions now handle a FaceGraph test completed to check their use with Polyhedron_3 and Surface_mesh typedef Point added in Polyhedron_3 to handle with no difference Surface_mesh and Polyhedron_3
these 3 functions now handle a FaceGraph test completed to check their use with Polyhedron_3 and Surface_mesh typedef Point added in Polyhedron_3 to handle with no difference Surface_mesh and Polyhedron_3