1.Made the Get z 'height'(imd + turret imd) a function called establishTargetHeight to remove hacky checks and such
2.Few minor changes to various variables.
3.Fixed some building height check problems like missile not able to hit fortress etc(hopefully)
git-svn-id: svn+ssh://svn.gna.org/svn/warzone/trunk@938 4a71c877-e1ca-e34f-864e-861f7616d084