Fixed another bug that got introduced with the last few changes.

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10146 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Fixed another bug that got introduced with the last few changes.

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10147 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Updated for the changes to ReplaceMissingWithUserConstant

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10148 e0a1b77d-ad91-4216-81b1-defd5f83fa92