Simplified filter index building in Tally.get_values(...) per @paulromanos comments
Simplified filter index building in Tally.get_values(...) per @paulromanos comments

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