Fixing off-by-one error in material/temp indexing when crossing surfaces in DAGMC.
Fixing off-by-one error in material/temp indexing when crossing surfaces in DAGMC.

liangjg/openmc,amandalund/openmc,amandalund/openmc,shikhar413/openmc,liangjg/openmc,smharper/openmc,mit-crpg/openmc,mit-crpg/openmc,walshjon/openmc,smharper/openmc,walshjon/openmc,amandalund/openmc,liangjg/openmc,paulromano/openmc,smharper/openmc,paulromano/openmc,wbinventor/openmc,mit-crpg/openmc,shikhar413/openmc,paulromano/openmc,wbinventor/openmc,smharper/openmc,paulromano/openmc,wbinventor/openmc,amandalund/openmc,shikhar413/openmc,shikhar413/openmc,liangjg/openmc,walshjon/openmc,wbinventor/openmc,walshjon/openmc,mit-crpg/openmc