fixed a bug in rigid body quaternion kernel
fixed a bug in rigid body quaternion kernel

amelmquist/chrono,armanpazouki/chrono,tjolsen/chrono,rserban/chrono,projectchrono/chrono,projectchrono/chrono,andrewseidl/chrono,amelmquist/chrono,Milad-Rakhsha/chrono,armanpazouki/chrono,jcmadsen/chrono,amelmquist/chrono,andrewseidl/chrono,tjolsen/chrono,tjolsen/chrono,projectchrono/chrono,armanpazouki/chrono,projectchrono/chrono,armanpazouki/chrono,Milad-Rakhsha/chrono,Milad-Rakhsha/chrono,dariomangoni/chrono,projectchrono/chrono,dariomangoni/chrono,Milad-Rakhsha/chrono,andrewseidl/chrono,armanpazouki/chrono,projectchrono/chrono,tjolsen/chrono,jcmadsen/chrono,amelmquist/chrono,amelmquist/chrono,jcmadsen/chrono,dariomangoni/chrono,jcmadsen/chrono,tjolsen/chrono,rserban/chrono,Milad-Rakhsha/chrono,jcmadsen/chrono,rserban/chrono,Milad-Rakhsha/chrono,rserban/chrono,rserban/chrono,rserban/chrono,rserban/chrono,amelmquist/chrono,armanpazouki/chrono,dariomangoni/chrono,andrewseidl/chrono,jcmadsen/chrono,jcmadsen/chrono,dariomangoni/chrono,dariomangoni/chrono,andrewseidl/chrono