minor fixes

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/metamisc@265 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
update validation functionalities

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/metamisc@266 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
remove coefficients from validation object

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/metamisc@267 edb9625f-4e0d-4859-8d74-9fd3b1da38cb