jumping to a person using the baton slug firing attack log sends you to the void

## Testmerges
#10830: 'CMLIVE!™️' by hry-gh at commit 858d10d4d6
#10883: 'Blocks tiles you cannot view while looking up' by Git-Nivrak at commit 5d0d58b9f6
#10926: 'Medals Overhaul' by realforest2001 at commit 7df4ad80f9
#7242: 'Yautja Clan TGUI Menu' by realforest2001 at commit 2381ac0a1b
#10999: 'Fix of various plane related issues' by Blundir at commit f85a7153c4
#10375: 'Corporate Bodyguard' by realforest2001 at commit da1f46b571
#10964: 'Fixes for negative power and APC polish' by Drulikar at commit cfebf58f27
#11024: 'Announcement garble w/o coms and stars_decode_html fix' by Drulikar at commit d39df0c669
#10937: 'Various deconstruction do_after exploit fixes and cleanup' by Drulikar at commit 1c988dda9a
#11042: 'Emissive Pred Masks' by realforest2001 at commit c36450732b
#11099: 'Fix MD and QuadTrees' by Drulikar at commit 54694a0eeb

## Round ID
30858

## Description of the bug
title

## What's the difference with what should have happened?
i should jump to the shooter

## How do we reproduce this bug?
1) fire baton slug
2) press the JMP button on the attack log for it

## Attached logs
```
ATTACK: XXXXXX fired a grenade (HIRR baton slug) from a (M85A1 grenade launcher (B.B.) (Wielded)). (JMP)
```

## Additional details
- Author: Vending Machine
- Admin: Vending Machine
- Note: None

Start by reproducing round 30858's baton slug attack and pressing JMP on its attack-log entry. Trace the attack-log jump handling alongside the baton slug firing path, then verify that the JMP action reaches the shooter rather than the void.

Written by the indexing model from the issue text.