Updated psychotree-Ex.Rout.save.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/prefmod@238 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Changed calls to grid functions make R CMD check more happy.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/prefmod@239 edb9625f-4e0d-4859-8d74-9fd3b1da38cb