Lua callback: onUsedAmmo, after using up an ammo
Useful to know when e.g. shotgun attack has finished
Syntax: onUsedAmmo(ammoType)
* ammoType: Ammo type of used ammo
Note: Not called for ammo type amNothing
Thanks to KoBeWi
Fix incorrect size of Beach theme icons
The icons had about double the required size. This caused a graphical glitch when selecting Beach and hand-drawn map.