kilo shotgun fix (#3714)

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## About The Pull Request
Hello everybody my name is market pliers and today we will be pulling
the plug

## Why It's Good For The Game

fixes #3682

## Changelog

:cl:
fix: the kilo sawnoff shotgun is no longer the private domicile of The
Void
/:cl:

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---------

Signed-off-by: Theos <[email protected]>

_maps/shuttles/independent/independent_kilo.dmm

@@ -662,12 +662,10 @@
 	dir = 8
 	},
 /obj/item/storage/box/ammo/a12g_rubbershot,
-/obj/item/gun/ballistic/shotgun/doublebarrel/presawn{
-	default_ammo_type = 0
-	},
 /obj/structure/cable/pink{
 	icon_state = "4-10"
 	},
+/obj/item/gun/ballistic/shotgun/doublebarrel/presawn/empty,
 /turf/open/floor/plasteel/dark,
 /area/ship/bridge)
 "gs" = (

code/modules/projectiles/guns/ballistic/shotgun.dm

@@ -353,6 +353,8 @@ EMPTY_GUN_HELPER(shotgun/doublebarrel)
 		/obj/item/ammo_box/magazine/internal/shot/dual/lethal,
 	)
 
+EMPTY_GUN_HELPER(shotgun/doublebarrel/presawn)
+
 /obj/item/gun/ballistic/shotgun/doublebarrel/roumain
 	name = "HP antique double-barreled shotgun"
 	desc = "A special-edition shotgun hand-made by Hunter's Pride with a high-quality walnut stock inlaid with brass scrollwork. Shotguns like this are very rare outside of the Saint-Roumain Militia's ranks. Otherwise functionally identical to a common double-barreled shotgun. Chambered in 12g."