Clarifying the memory allocation of arrays of triplets of ints and doubles. Jianfei and I doubt that this will fix the memory leak, but Jianfei has asked me to try it.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/ptinpoly@30 edb9625f-4e0d-4859-8d74-9fd3b1da38cb