cleanup and fix logic error detecting wrong version of Embree
cleanup and fix logic error detecting wrong version of Embree

MengjiaoH/ospray,wilsonCernWq/ospray,MengjiaoH/ospray,ospray/OSPRay,ospray/OSPRay,wilsonCernWq/ospray,MengjiaoH/ospray,MengjiaoH/ospray,wilsonCernWq/ospray,ospray/OSPRay,ospray/OSPRay,MengjiaoH/ospray