Add Armor Class to Hexen MiniHUD

[DoomRater]

One of the things I like about the miniHUD is that it just gives me info I need without any fancy graphics to get in my way. However, there's one thing that's been missing from Hexen's miniHUD since day one- a display of the current Armor Class. My current workaround is to create a binding that pops up the main HUD so I can read it and then goes back to the miniHUD, but I would like to be able to see this at a moment's glance.