
  o RooChi2Var

    - Add special handling of zero bins

      zero data & zero pdf --> no contribution to chi^2
      zero data & non-zero pdf --> return 0 --> RooMinuit will put up 'wall'


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@6400 27541ba8-7e3a-0410-8455-c3a389f83636

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