[ZDoom] Ammo Icon for Hexen/Heretic Weapons

[Tormentor667]

Well, I finally found out how to add Hexen/Heretic weapons to Doom via the ZDoom Engine. But there is one problem left: If you use one of Doom's weapons, zDoom shows you a small ammo icon on the left bottom for the specific weapon. If you use a Hexen/Heretic weapon, it doesn't. Which GFX is responsible for this thing? How can I add one?!

*EDIT*
Sorry, wrong forum, please move to editing!