fixed default value issue in defung tests

git-svn-id: http://acl2-books.googlecode.com/svn/branches/6.3@2306 303c5b2c-9740-0410-b014-fd8f9db7be32
fixed tarai declaration

git-svn-id: http://acl2-books.googlecode.com/svn/branches/6.3@2310 303c5b2c-9740-0410-b014-fd8f9db7be32