Beheaded Corpses Have Eyes In Their Sprite.

## Testmerges
#9894: 'Multiz indicator' by Detective-Google at commit 5dbc10a0d2
#7093: 'creates ipcheck subsystem' by hry-gh at commit 2a3e40559b
#10340: 'New on_mobs for splints, bandages and blood overlays (Other changes to blood included)' by LC4492 at commit 14a671a4e4
#10485: 'VERY Limited Nest Resisting' by realforest2001 at commit 240f264f65
#9774: 'Adds a minesweeper game to a bunch of interactions.' by kiVts at commit 97cf34943e
#8963: 'Ports tacmap port from PVE' by Git-Nivrak at commit 2c855e0239

## Round ID
30198

## Description of the bug
Title. Beheaded corpses still have eyes in their sprite.

## What's the difference with what should have happened?
Headless corpses shouldn't have eyes, as the eyes presumably came off with the head.

## How do we reproduce this bug?
1. Behead a humanoid.
2. Observe the corpse, notably with two eyes.

## Attached logs
```
N/A
```

## Additional details
- Author: ValiantEar
- Admin: Steelpoint
- Note: None

Reproduce the issue by beheading a humanoid and observing the corpse sprite. Trace the corpse and sprite handling from that reproduction, then update the relevant asset or behavior so headless corpses no longer show eyes; confirm the result in-game.

Written by the indexing model from the issue text.