Changes to krlmm to avoid error that occurs in k-means clustering when all intensities are identical

git-svn-id: https://hedgehog.fhcrc.org/bioconductor/trunk/madman/Rpacks/crlmm@88225 bc3139a8-67e5-0310-9ffc-ced21a209358
Initial commit
Confirming bridge
Merge branch 'local-hedgehog'