I corrected a bug with the multipass CSG discretization. It created
incorrect results in regions where one or more boundaries was referenced
multiple times and the total number of boundaries in the mesh was greater
than 512. This resolves #1975.



git-svn-id: http://visit.ilight.com/svn/visit/trunk/src@24397 18c085ea-50e0-402c-830e-de6fd14e8384