Change various things to subtypesof()

code/controllers/subsystems/events.dm

@@ -13,7 +13,7 @@ SUBSYSTEM_DEF(events)
 	var/datum/event_meta/new_event = new
 
 /datum/controller/subsystem/events/Initialize()
-	allEvents = typesof(/datum/event) - /datum/event
+	allEvents = subtypesof(/datum/event)
 	event_containers = list(
 			EVENT_LEVEL_MUNDANE 	= new/datum/event_container/mundane,
 			EVENT_LEVEL_MODERATE	= new/datum/event_container/moderate,

code/controllers/subsystems/plants.dm

@@ -62,7 +62,7 @@ SUBSYSTEM_DEF(plants)
 				accessible_product_sprites |= base
 
 	// Populate the global seed datum list.
-	for(var/type in typesof(/datum/seed)-/datum/seed)
+	for(var/type in subtypesof(/datum/seed))
 		var/datum/seed/S = new type
 		seeds[S.name] = S
 		S.uid = "[seeds.len]"