Polaris tweaks.

Fixes mistake involving belts.
Fixes mistake involving bags allowing w_class 5 items, which was from the manual merge.
Polaris tweaks

Makes inflatables w_class 3.
Spacesuits and RIGs are now w_class 5.
Both sniper weapons are now w_class 5.
Makes more inventories able to use the volume based system.
Cleans up the cig part of the port a bit.

code/game/objects/structures/inflatable.dm

@@ -40,7 +40,7 @@
 /obj/structure/inflatable/bullet_act(var/obj/item/projectile/Proj)
 	var/proj_damage = Proj.get_structure_damage()
 	if(!proj_damage) return
-	
+
 	health -= proj_damage
 	..()
 	if(health <= 0)
@@ -248,6 +248,7 @@
 	desc = "Contains inflatable walls and doors."
 	icon_state = "inf_box"
 	item_state = "syringe_kit"
+	w_class = 3
 	max_storage_space = 28
 	can_hold = list(/obj/item/inflatable)