* Updated to ZDoom 4246:
- For the sake of better testing, use 2D sprite sorting unconditionally and not just when a voxel is in view. [Software only. Irrelevant to OpenGL.]
- 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.
- 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/gzdoom/trunk@1562 b0f79afe-0144-0410-b225-9a4edf0717df