Fix apple compilation.
Fix apple compilation.

Copy/pasted platform-specific code, and the variable name
changed...


git-svn-id: 83c4c97093aeea62ac982fbfd516bf9db27f5c99@2055 c36c8488-0289-0348-9b64-b301f74bd9a7

BlueBrain/Tuvok,BlueBrain/Tuvok,BlueBrain/Tuvok