- fix a bug in TH1::KolmogorovTest for scaled histograms (reported by Marc Escalier)

  The routine has been modified from the original hdiff to use always the effective entries for normalizing the 
   max distance. 
  Now in princile it could also be used also for comparing an histogram with a function created as an histogram 
  with zero errors (equivalent to option F1 or F2 in the original HDIFF.


git-svn-id: http://root.cern.ch/svn/root/trunk@23661 27541ba8-7e3a-0410-8455-c3a389f83636