Fix Argoniel's weapon resolver

Fix cold theme not generating on randarts

game/modules/tome/class/GameState.lua

@@ -254,7 +254,7 @@ local unided_names = {"glowing","scintillating","rune-covered","unblemished","je
 _M.power_themes = {
 	'physical', 'mental', 'spell', 'defense', 'misc', 'fire',
 	'lightning', 'acid', 'mind', 'arcane', 'blight', 'nature',
-	'temporal', 'light', 'dark', 'antimagic'
+	'temporal', 'light', 'dark', 'antimagic', 'cold'
 }
 
 --- defined power sources, used for equipment generation, defined in class descriptors

game/modules/tome/data/general/objects/random-artifacts/generic.lua

@@ -20,7 +20,7 @@
 local Stats = require "engine.interface.ActorStats"
 local Talents = require "engine.interface.ActorTalents"
 
--- Themes list: physical, mental, spell, defense, misc, fire, lightning, acid, mind, arcane, blight, nature, temporal, light, dark, antimagic
+-- Themes list: physical, mental, spell, defense, misc, fire, lightning, acid, mind, arcane, blight, nature, temporal, light, dark, antimagic, cold
 
 ----------------------------------------------------------------
 -- Spell Themes

game/modules/tome/data/zones/high-peak/npcs.lua

@@ -160,7 +160,7 @@ newEntity{
 
 	body = { INVEN = 10, MAINHAND=1, OFFHAND=1, BODY=1, FEET=1, HEAD=1, HANDS=1 },
 	resolvers.equip{
-		{type="weapon", subtype="sword", force_drop=true,  forbid_power_source={antimagic=true}, tome_drops="boss", autoreq=true},
+		{type="weapon", subtype="longsword", force_drop=true,  forbid_power_source={antimagic=true}, tome_drops="boss", autoreq=true},
 		{type="weapon", subtype="waraxe", force_drop=true, forbid_power_source={antimagic=true}, tome_drops="boss", autoreq=true},
 		{type="armor", subtype="massive", force_drop=true, forbid_power_source={antimagic=true}, tome_drops="boss", autoreq=true},
 		{type="armor", subtype="feet", name="pair of voratun boots", force_drop=true, forbid_power_source={antimagic=true}, tome_drops="boss", autoreq=true},