- Fixed crash when an actor's spawn state ends by destroying the actor and the first state has
  NoDelay set and it only consists of 0-tic states.

git-svn-id: http://mancubus.net/svn/hosted/zdoom/zdoom/trunk@4245 a95907f1-e10c-0410-b46f-9e587ccb1026
- Added a DropAmmoFactor field to WeaponGiver so that ModifyDropAmount() can record the drop
  amount modifier into it without fiddling with the actual AmmoGiveX fields.

git-svn-id: http://mancubus.net/svn/hosted/zdoom/zdoom/trunk@4246 a95907f1-e10c-0410-b46f-9e587ccb1026