Updated NEWS file with delaunayn() error-throwing behaviour

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/geometry@153 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Fixed typo


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/geometry@154 edb9625f-4e0d-4859-8d74-9fd3b1da38cb