Fix bug where vector was not set to zero before loading forces (reporting only)
Fix bug where vector was not set to zero before loading forces (reporting only)

dariomangoni/chrono,dariomangoni/chrono,Milad-Rakhsha/chrono,dariomangoni/chrono,rserban/chrono,projectchrono/chrono,projectchrono/chrono,Milad-Rakhsha/chrono,rserban/chrono,projectchrono/chrono,rserban/chrono,dariomangoni/chrono,dariomangoni/chrono,projectchrono/chrono,dariomangoni/chrono,Milad-Rakhsha/chrono,Milad-Rakhsha/chrono,rserban/chrono,Milad-Rakhsha/chrono,Milad-Rakhsha/chrono,projectchrono/chrono,rserban/chrono,projectchrono/chrono,rserban/chrono,rserban/chrono