for the next Rcpp version, we need to import something from Rcpp to instantiate internal Rcpp properly


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rprotobuf@795 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
slight reordering


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rprotobuf@796 edb9625f-4e0d-4859-8d74-9fd3b1da38cb