Add new members in TGeoManager:

   Int_t                 fOverlapSize;      //! current size of fOverlapClusters
   Int_t                 fOverlapMark;      //! current recursive position in fOverlapClusters
   Int_t                *fOverlapClusters;  //! internal array for overlaps

The new array fOverlapClusters is used instead of the dynamically allocated arrays
in TGeoManager::SearchNode.

TGeoManager::FindNextBoundary has a new option (using the input value of the parameter
stepmax) to trigger optionally the computation of the normals.


git-svn-id: http://root.cern.ch/svn/root/trunk@7935 27541ba8-7e3a-0410-8455-c3a389f83636