Fix more pathfinding issues.
Change the way the long-range pathfinder rasterisation works slightly so that we have a better compatibility with the short-range pathfinder. Should fix the "stuck units" issues, though I am not sure so I am not marking them as fixed so far. Refs #3471, #3505, and possibly #3292.
Caveat: I am now using clearance of 0.8 for "default" class, which might have side-effects: please report anything weird.
Also fix leftover style issues.
git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@17161 3db68df2-c116-0410-a063-a993310a9797