makes w_class use defines (#9848)

code/modules/detectivework/forensics.dm

@@ -1,6 +1,6 @@
 /obj/item/forensics
 	icon = 'icons/obj/forensics.dmi'
-	w_class = 1
+	w_class = ITEMSIZE_TINY
 
 //This is the output of the stringpercent(print) proc, and means about 80% of
 //the print must be there for it to be complete.  (Prints are 32 digits)
@@ -38,4 +38,4 @@ atom/proc/add_fibers(mob/living/carbon/human/M)
 	if(M.gloves && (M.gloves.body_parts_covered & ~suit_coverage))
 		fibertext = "Material from a pair of [M.gloves.name]."
 		if(prob(20*item_multiplier) && !(fibertext in suit_fibers))
-			suit_fibers += "Material from a pair of [M.gloves.name]."
+			suit_fibers += "Material from a pair of [M.gloves.name]."

code/modules/detectivework/tools/evidencebag.dm

@@ -6,7 +6,7 @@
 	icon = 'icons/obj/storage.dmi'
 	icon_state = "evidenceobj"
 	item_state = ""
-	w_class = 2
+	w_class = ITEMSIZE_SMALL
 	var/obj/item/stored_item = null
 
 /obj/item/evidencebag/MouseDrop(var/obj/item/I as obj)

code/modules/detectivework/tools/rag.dm

@@ -16,7 +16,7 @@
 /obj/item/reagent_containers/glass/rag
 	name = "rag"
 	desc = "For cleaning up messes, you suppose."
-	w_class = 1
+	w_class = ITEMSIZE_TINY
 	icon = 'icons/obj/janitor.dmi'
 	icon_state = "rag"
 	amount_per_transfer_from_this = 5
@@ -275,7 +275,7 @@
 /obj/item/reagent_containers/glass/rag/advanced
 	name = "microfiber cloth"
 	desc = "A synthetic fiber cloth; the split fibers and the size of the individual filaments make it more effective for cleaning purposes."
-	w_class = 1
+	w_class = ITEMSIZE_TINY
 	icon = 'icons/obj/janitor.dmi'
 	icon_state = "advrag"
 	amount_per_transfer_from_this = 10

code/modules/detectivework/tools/sample_kits.dm

@@ -1,7 +1,7 @@
 /obj/item/sample
 	name = "forensic sample"
 	icon = 'icons/obj/forensics.dmi'
-	w_class = 1
+	w_class = ITEMSIZE_TINY
 	var/list/evidence = list()
 
 /obj/item/sample/New(var/newloc, var/atom/supplied)
@@ -125,7 +125,7 @@
 	name = "fiber collection kit"
 	desc = "A magnifying glass and tweezers. Used to lift suit fibers."
 	icon_state = "m_glass"
-	w_class = 2
+	w_class = ITEMSIZE_SMALL
 	var/evidence_type = "fiber"
 	var/evidence_path = /obj/item/sample/fibers
 

code/modules/detectivework/tools/scene_cards.dm

@@ -4,7 +4,7 @@
 	icon = 'icons/obj/forensics.dmi'
 	icon_state = "markerbox"
 	icon_type = "marker"
-	w_class = 1
+	w_class = ITEMSIZE_TINY
 	storage_slots = 7
 	can_hold = list(/obj/item/csi_marker)
 	starts_with = list(
@@ -24,7 +24,7 @@
 	icon_state = "card1"
 	drop_sound = 'sound/items/drop/card.ogg'
 	pickup_sound = 'sound/items/pickup/card.ogg'
-	w_class = 1
+	w_class = ITEMSIZE_TINY
 	randpixel = 1
 	layer = ABOVE_MOB_LAYER //so you can mark bodies
 	var/number = 1

code/modules/detectivework/tools/uvlight.dm

@@ -3,7 +3,7 @@
 	desc = "A small handheld black light."
 	icon_state = "uv_off"
 	slot_flags = SLOT_BELT
-	w_class = 2
+	w_class = ITEMSIZE_SMALL
 	item_state = "electronic"
 	matter = list(DEFAULT_WALL_MATERIAL = 150)
 	origin_tech = list(TECH_MAGNET = 1, TECH_ENGINEERING = 1)