Fix distance-to-surface calculationg for general plane surface.
Fix distance-to-surface calculationg for general plane surface.

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