animate1.list fix calls to interpPairs

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/ecdat@208 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
interpPairs: improve diagnostics

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/ecdat@209 edb9625f-4e0d-4859-8d74-9fd3b1da38cb