New constructor:
   TCutG(const char *name, Int_t n, Double_t *x, Double_t *y);
  Signature for function IsInside changed to:
   virtual Int_t  IsInside(Double_t x, Double_t y);


git-svn-id: http://root.cern.ch/svn/root/trunk@144 27541ba8-7e3a-0410-8455-c3a389f83636