remove unnecessary cast

git-svn-id: http://h2database.googlecode.com/svn/trunk@4986 e6896862-9d19-0410-bfb3-e9fa5d50e656
revert my previous change

git-svn-id: http://h2database.googlecode.com/svn/trunk@4987 e6896862-9d19-0410-bfb3-e9fa5d50e656