to the center of the track according to the relative distance of its target
(more precisely: it will move the interpolation control points). This
results in the ball being better align when it switches to aim-directly-at-
target mode, meaning that the target-distance can be reduced, hopefully
reducing the frequency with which tunneling happens.
git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@10016 178a84e3-b1eb-0310-8ba1-8eac791a3b58