Forensics re-destroyed, but better this time.

All lists are LAZYINITLIST, cleaning code is preserved, examine is preserved. We should be back in buisness, but this is just a 'holy fuck finally' commit

code/game/objects/effects/decals/cleanable/humans.dm

@@ -7,12 +7,10 @@
 	blood_state = BLOOD_STATE_BLOOD
 	bloodiness = MAX_SHOE_BLOODINESS
 	color = BLOOD_COLOR_HUMAN //default so we don't have white splotches everywhere.
-	var/list/Blood_DNA = list()
 
 /obj/effect/decal/cleanable/blood/replace_decal(obj/effect/decal/cleanable/blood/C)
-	C.add_blood_DNA(return_blood_DNA())
-	if(C.Blood_DNA.len)
-		Blood_DNA |= C.Blood_DNA.Copy()
+	if (C.blood_DNA)
+		blood_DNA |= C.blood_DNA.Copy()
 	if (bloodiness)
 		if (C.bloodiness < MAX_SHOE_BLOODINESS)
 			C.bloodiness += bloodiness
@@ -28,9 +26,6 @@
 	update_icon()
 
 /obj/effect/decal/cleanable/blood/update_icon()
-	GET_COMPONENT(D, /datum/component/forensics)
-	if(D)
-		Blood_DNA = D.blood_DNA
 	color = blood_DNA_to_color()
 
 /obj/effect/decal/cleanable/blood/old