height as the actual track (if the drivelines are lower,
karts when rescued will appear to be under the track,
triggering a rescue, ...).
git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/trunk/supertuxkart@1415 178a84e3-b1eb-0310-8ba1-8eac791a3b58