indent for calculate.cluster.size.moments.from.model

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/colgem@33 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
also return first order moments in 'calculate.cluster.size.moments.from.model'

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/colgem@34 edb9625f-4e0d-4859-8d74-9fd3b1da38cb