Further code cleanup.

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10221 e0a1b77d-ad91-4216-81b1-defd5f83fa92
More code cleanup to remove warnings.

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10222 e0a1b77d-ad91-4216-81b1-defd5f83fa92
More tidy up from Eibe

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10223 e0a1b77d-ad91-4216-81b1-defd5f83fa92