Fixes N+S Captain loadout (#3165)

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## About The Pull Request

I forgot to set some slots on the N+S Captain loadout to NULL, causing
them to inherit normal Nanotrasen items. This PR nulls them out, making
the N+S Captain effectively dressed as a Quartermaster, as he should be.

## Why It's Good For The Game

bugfixes good

## Changelog

:cl:
fix: N+S Captains no longer spawn with Nanotrasen coats.
/:cl:

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code/modules/clothing/outfits/factions/nanotrasen.dm

@@ -53,9 +53,13 @@
 
 	head = /obj/item/clothing/head/nanotrasen/cap/supply
 	uniform = /obj/item/clothing/under/nanotrasen/supply/qm
+	suit = null
+	alt_suit = null
 	dcoat = /obj/item/clothing/suit/hooded/wintercoat/cargo
 	shoes = /obj/item/clothing/shoes/sneakers/brown
 	glasses = /obj/item/clothing/glasses/sunglasses
+	gloves = null
+	neck = null
 	l_hand = /obj/item/clipboard
 
 	chameleon_extras = /obj/item/stamp/qm