makes w_class use defines (#9848)

code/modules/mining/coins.dm

@@ -9,7 +9,7 @@
 	flags = CONDUCT
 	force = 0.0
 	throwforce = 0.0
-	w_class = 1.0
+	w_class = ITEMSIZE_TINY
 	slot_flags = SLOT_EARS
 	var/string_attached
 	var/sides = 2

code/modules/mining/mine_items.dm

@@ -63,7 +63,7 @@
 	slot_flags = SLOT_BELT
 	throwforce = 4.0
 	force = 10.0
-	w_class = 4.0
+	w_class = ITEMSIZE_LARGE
 	matter = list(DEFAULT_WALL_MATERIAL = 3750)
 	var/digspeed //moving the delay to an item var so R&D can make improved picks. --NEO
 	origin_tech = list(TECH_MATERIAL = 1, TECH_ENGINEERING = 1)
@@ -191,7 +191,7 @@
 		attack_self(usr)
 
 /obj/item/pickaxe/offhand
-	w_class = 5
+	w_class = ITEMSIZE_HUGE
 	icon = 'icons/obj/weapons.dmi'
 	icon_state = "offhand"
 	item_state = null
@@ -369,7 +369,7 @@
 	slot_flags = SLOT_BELT
 	force = 8.0
 	throwforce = 4.0
-	w_class = 3.0
+	w_class = ITEMSIZE_NORMAL
 	origin_tech = list(TECH_MATERIAL = 1, TECH_ENGINEERING = 1)
 	matter = list(DEFAULT_WALL_MATERIAL = 50)
 	attack_verb = list("bashed", "bludgeoned", "thrashed", "whacked")
@@ -387,7 +387,7 @@
 	item_state = "spade"
 	force = 5.0
 	throwforce = 7.0
-	w_class = 2.0
+	w_class = ITEMSIZE_SMALL
 
 // Flags.
 
@@ -397,7 +397,7 @@
 	singular_name = "flag"
 	amount = 25
 	max_amount = 25
-	w_class = 2
+	w_class = ITEMSIZE_SMALL
 	icon = 'icons/obj/mining.dmi'
 	var/upright = FALSE
 	var/base_state
@@ -501,7 +501,7 @@
 	icon_state = "track15"
 	density = FALSE
 	anchored = TRUE
-	w_class = 3
+	w_class = ITEMSIZE_NORMAL
 	layer = 2.44
 
 /obj/structure/track/Initialize()
@@ -637,7 +637,7 @@
 	icon_state = "pinoff"
 	flags = CONDUCT
 	slot_flags = SLOT_BELT
-	w_class = 2.0
+	w_class = ITEMSIZE_SMALL
 	item_state = "electronic"
 	throw_speed = 4
 	throw_range = 20
@@ -704,7 +704,7 @@
 	icon_state = "jaunter"
 	item_state = "jaunter"
 	throwforce = 0
-	w_class = 2
+	w_class = ITEMSIZE_SMALL
 	throw_speed = 3
 	throw_range = 5
 	slot_flags = SLOT_BELT
@@ -788,7 +788,7 @@
 	icon_state = "borghypo"
 	item_state = "hypo"
 	throwforce = 0
-	w_class = 2
+	w_class = ITEMSIZE_SMALL
 	throw_speed = 3
 	throw_range = 5
 	var/loaded = TRUE
@@ -874,7 +874,7 @@ var/list/total_extraction_beacons = list()
 	contained_sprite = TRUE
 	icon = 'icons/obj/mining_contained.dmi'
 	icon_state = "fulton"
-	w_class = 3
+	w_class = ITEMSIZE_NORMAL
 	var/obj/structure/extraction_point/beacon
 	var/list/beacon_networks = list("station")
 	var/uses_left = 3
@@ -1077,7 +1077,7 @@ var/list/total_extraction_beacons = list()
 	icon_state = "magneto"
 	item_state = "magneto"
 	desc = "A handheld device that creates a well of negative force that attracts minerals of a very specific type, size, and state to its user."
-	w_class = 3
+	w_class = ITEMSIZE_NORMAL
 	force = 10
 	throwforce = 5
 	origin_tech = list(TECH_MAGNET = 4, TECH_ENGINEERING = 3)
@@ -1115,7 +1115,7 @@ var/list/total_extraction_beacons = list()
 	icon_state = "supermagneto"
 	item_state = "jaunter"
 	desc = "A handheld device that creates a well of warp energy that teleports minerals of a very specific type, size, and state to its user."
-	w_class = 3
+	w_class = ITEMSIZE_NORMAL
 	force = 15
 	throwforce = 5
 	origin_tech = list(TECH_BLUESPACE = 4, TECH_ENGINEERING = 3)

code/modules/mining/ore.dm

@@ -3,7 +3,7 @@
 	icon = 'icons/obj/mining.dmi'
 	icon_state = "ore1"
 	randpixel = 8
-	w_class = 2
+	w_class = ITEMSIZE_SMALL
 	throwforce = 10
 	var/datum/geosample/geologic_data
 	var/material
@@ -94,4 +94,4 @@
 		var/obj/item/device/core_sampler/C = W
 		C.sample_item(src, user)
 	else
-		return ..()
+		return ..()