Fix: AMMOTYPE::highExplosive was sometimes interpreted as an item number, sometimes as boolean, and sometimes a an index over explosives. It is now treated as an item number

git-svn-id: https://ja2svn.dyndns.org/source/ja2/trunk/GameSource/ja2_v1.13@6124 3b4a5df2-a311-0410-b5c6-a8a6f20db521
improved multiturn action cost handling

git-svn-id: https://ja2svn.dyndns.org/source/ja2/trunk/GameSource/ja2_v1.13@6126 3b4a5df2-a311-0410-b5c6-a8a6f20db521