Merge pull request #3517 from Fox-McCloud/wiz-fix

Fixes Roundstart runtime with Spellbooks

code/game/gamemodes/wizard/spellbook.dm

@@ -413,6 +413,8 @@
 	log_name = "SG"
 
 /datum/spellbook_entry/summon/guns/IsAvailible()
+	if(!ticker.mode) // In case spellbook is placed on map
+		return 0
 	if(ticker.mode.name == "ragin' mages")
 		return 0
 	else
@@ -434,6 +436,8 @@
 	log_name = "SU"
 
 /datum/spellbook_entry/summon/magic/IsAvailible()
+	if(!ticker.mode) // In case spellbook is placed on map
+		return 0
 	if(ticker.mode.name == "ragin' mages")
 		return 0
 	else
@@ -463,8 +467,7 @@
 	var/list/datum/spellbook_entry/entries = list()
 	var/list/categories = list()
 
-/obj/item/weapon/spellbook/New()
-	..()
+/obj/item/weapon/spellbook/proc/Initialize()
 	var/entry_types = subtypesof(/datum/spellbook_entry) - /datum/spellbook_entry/item - /datum/spellbook_entry/summon
 	for(var/T in entry_types)
 		var/datum/spellbook_entry/E = new T
@@ -475,6 +478,10 @@
 			qdel(E)
 	tab = categories[1]
 
+/obj/item/weapon/spellbook/New()
+	..()
+	Initialize()
+
 /obj/item/weapon/spellbook/attackby(obj/item/O as obj, mob/user as mob, params)
 	if(istype(O, /obj/item/weapon/contract))
 		var/obj/item/weapon/contract/contract = O
@@ -640,6 +647,9 @@
 	..()
 	name += spellname
 
+/obj/item/weapon/spellbook/oneuse/Initialize() //No need to init
+	return
+
 /obj/item/weapon/spellbook/oneuse/attack_self(mob/user as mob)
 	var/obj/effect/proc_holder/spell/S = new spell
 	for(var/obj/effect/proc_holder/spell/knownspell in user.spell_list)