Fix: no bullet when not targetting a soldier

git-svn-id: https://ja2svn.dyndns.org/source/ja2/trunk/GameSource/ja2_v1.13@5992 3b4a5df2-a311-0410-b5c6-a8a6f20db521
- Fix: calculation of squadleader suppression boni was wrong
- Fix: possible underflow averted

git-svn-id: https://ja2svn.dyndns.org/source/ja2/trunk/GameSource/ja2_v1.13@5993 3b4a5df2-a311-0410-b5c6-a8a6f20db521