Fueled aircraft fail to return to refuel

[Decimator]

http://taspring.clan-sy.com/mantis/view.php?id=352

All aircraft which use fuel fail to return to base after reaching a certain distance. I have marked this distance in the screenshot of Giant hills and valleys. The aircraft simply lands on the spot. The amount of fuel the aircraft carries does not matter. Tested in E&E .171 http://www.unknown-files.net/index.php? ... &dlid=2038

The distance that matters is the distance from the airbase. After a certain point it will not return. Also of note is that if one FPSes a failed aircraft back within this range, it will then return to the airbase. This bug existed before 0.74b2