Use ZN_USE_VIRTUALENV for command line version of ZINC_USE_VIRTUALENV.
Use ZN_USE_VIRTUALENV for command line version of ZINC_USE_VIRTUALENV.

OpenCMISS/zinc,OpenCMISS/zinc,hsorby/zinc,OpenCMISS/zinc,hsorby/zinc,hsorby/zinc,hsorby/zinc,OpenCMISS/zinc