fix: output the Z coordinate if it exists

git-svn-id: http://h2database.googlecode.com/svn/trunk@5576 e6896862-9d19-0410-bfb3-e9fa5d50e656
fix doc

git-svn-id: http://h2database.googlecode.com/svn/trunk@5577 e6896862-9d19-0410-bfb3-e9fa5d50e656
changelog entry for: Fix bug in varags support in ALIAS's, patch from Nicolas Fortin    


git-svn-id: http://h2database.googlecode.com/svn/trunk@5578 e6896862-9d19-0410-bfb3-e9fa5d50e656