anchor.diff:  		..()
   
   /obj/item/stack/proc/copy_evidences(obj/item/stack/from as obj)
  +	if(!from)
  +		return
   	src.blood_DNA |= from.blood_DNA.Copy()
   	src.fingerprints  = from.fingerprints
   	src.fingerprintshidden  = from.fingerprintshidden
  
positive.code: 		src.max_res_amount = max_res_amount
  		src.time = time
  		src.one_per_turf = one_per_turf
  		src.on_floor = on_floor
negative.code: 
  /obj/item/stack/proc/get_amount()
  	if (is_cyborg)
  		if(source)
  			return round(source.energy / cost)
  		else
  			return 0
  	else
  		return (amount)
  
  