CSW - Belt Linking does not return unspent rounds

[LinkIsGrim]

Mods (complete and add to the following information):

• Arma 3: 2.12
• CBA: 3.15.8
• ACE3: 22b93e2

Description:
Linking belts with CSW does not return unspent ammunition to the mag source when it is a GroundWeaponHolder.

Steps to reproduce:

1. Create mission with player and a static weapon, with CSW ammo handling enabled and ammo storage set to "Ground".
2. Fire a few rounds with the static weapon, but don't empty the magazine.
3. Link the belt on the static weapon. Fresh magazine from the magSource will be removed, but unspent rounds from it will not be readded.

Expected behavior:
Same behavior as ace_reload belt linking.

Where did the issue occur?

• Dedicated / Singleplayer

Log Files:

• No relevant RPT, unimplemented behavior.

Additional context:
Add any other context about the problem here.

Screenshots:
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