[BUG] Box of Shotgun shell missing an empty state layer

[amo020]

Description

Shotgun ammo Box state layer missing an empty state

Environment

• Affects version: master ca5bf41

Affected entries:

name	id
box of shotgun shells	CMBoxShotgunBuckshot
box of shotgun slugs	CMBoxShotgunSlugs
box of incendiary slugs	CMBoxShotgunIncendiary
box of beanbag slugs	CMBoxShotgunBeanbag
box of flechette shells	CMBoxShotgunFlechette
box of incendiary buckshots	CMBoxShotgunIncendiaryBuckshot

Step to reproduce

• Equip a CMBoxShotgun
• Cycle ammo until empty (25 times)

Expected behaviour

Sprite *_e shows

Observed behaviour

State does not change. ZeroOnlyOnEmpty is not detected.

Screenshots

None remaining

Only one remaining

Additional context

Affected resources :
CM-14\Resources\Prototypes\_CM14\Entities\Objects\Weapons\Guns\Ammunition\Boxes\shotgun.yml

Partially empty state would be a nice to have but can be considered a new feature.