Updated for changes to J48's API

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10123 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Updated after J48 API changes. No visible difference in output - must be an additional space training the J48 option string or something

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10124 e0a1b77d-ad91-4216-81b1-defd5f83fa92