Fix bug in ChPovRay related to processing of OBJ files
Fix bug in ChPovRay related to processing of OBJ files

Fixes #351

projectchrono/chrono,rserban/chrono,dariomangoni/chrono,projectchrono/chrono,rserban/chrono,projectchrono/chrono,rserban/chrono,projectchrono/chrono,dariomangoni/chrono,dariomangoni/chrono,dariomangoni/chrono,rserban/chrono,dariomangoni/chrono,projectchrono/chrono,dariomangoni/chrono,projectchrono/chrono,rserban/chrono,rserban/chrono,rserban/chrono