zombie fix.
WHAT THE FUCK
fix for LoS vs LoF issue
fix for the previous fix.
- Try to fix the power source explosion.
- Fix smoke damaging tanks.
Merge branch 'master' of github.com:SupSuper/OpenXcom
removed debug thing
more fixes for lof checks

only run the extra checks for player units,
and only use it on the first bullet of an auto shot.
Merge branch 'master' of https://github.com/SupSuper/OpenXcom