Fix bug in setting VS compiler flags.
Fix bug in setting VS compiler flags.

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