Minor plant controller refactor.

code/controllers/subsystems/atoms.dm

@@ -18,6 +18,8 @@ SUBSYSTEM_DEF(atoms)
 	var/list/BadInitializeCalls = list()
 
 /datum/controller/subsystem/atoms/Initialize(timeofday)
+	if(!plant_controller) // Initialize seed repo for /obj/item/seed and /obj/item/weapon/grown
+		plant_controller = new
 	setupgenetics() //to set the mutations' place in structural enzymes, so initializers know where to put mutations.
 	initialized = INITIALIZATION_INNEW_MAPLOAD
 	to_world_log("Initializing objects")

code/game/world.dm

@@ -33,9 +33,6 @@
 	log_unit_test("If you did not intend to enable this please check code/__defines/unit_testing.dm")
 #endif
 
-	// Set up roundstart seed list.
-	plant_controller = new()
-
 	// This is kinda important. Set up details of what the hell things are made of.
 	populate_material_list()
 

code/modules/hydroponics/grown_inedible.dm

@@ -8,13 +8,11 @@
 	var/plantname
 	var/potency = 1
 
-/obj/item/weapon/grown/New(newloc,planttype)
+/obj/item/weapon/grown/Initialize(ml, planttype)
 
-	..()
+	. = ..()
 
-	var/datum/reagents/R = new/datum/reagents(50)
-	reagents = R
-	R.my_atom = src
+	create_reagents(50)
 
 	//Handle some post-spawn var stuff.
 	if(planttype)