Changed an #ifndef to a #ifdef in cmfd_solver.
Changed an #ifndef to a #ifdef in cmfd_solver.

lilulu/openmc,liangjg/openmc,shikhar413/openmc,wbinventor/openmc,wbinventor/openmc,walshjon/openmc,paulromano/openmc,mit-crpg/openmc,shikhar413/openmc,shikhar413/openmc,bhermanmit/openmc,paulromano/openmc,mit-crpg/openmc,johnnyliu27/openmc,mit-crpg/openmc,walshjon/openmc,paulromano/openmc,smharper/openmc,sxds/opemmc,lilulu/openmc,lilulu/openmc,smharper/openmc,wbinventor/openmc,bhermanmit/openmc,samuelshaner/openmc,shikhar413/openmc,paulromano/openmc,johnnyliu27/openmc,wbinventor/openmc,walshjon/openmc,kellyrowland/openmc,nhorelik/openmc,liangjg/openmc,samuelshaner/openmc,liangjg/openmc,liangjg/openmc,amandalund/openmc,sxds/opemmc,johnnyliu27/openmc,smharper/openmc,mjlong/openmc,amandalund/openmc,johnnyliu27/openmc,smharper/openmc,mit-crpg/openmc,samuelshaner/openmc,amandalund/openmc,kellyrowland/openmc,amandalund/openmc,mjlong/openmc,walshjon/openmc,samuelshaner/openmc,nhorelik/openmc