Duplicate increment operation removed
Duplicate increment operation removed

Duplicate increment operation leads to weird image numbering, fixed.

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