Add missing quest drop for Windows to the Source

fix: Include new parameter for OnGiveXP hook.

sql/world/base/zone_eversong_woods.sql

@@ -5,3 +5,5 @@ INSERT INTO `creature_questender` (`id`, `quest`) VALUES (15283, 8344);
 -- Windows to the Source (Warlock)
 DELETE FROM `creature_queststarter` WHERE `id`=15283 AND `quest`=8344;
 INSERT INTO `creature_queststarter` (`id`, `quest`) VALUES (15283, 8344);
+INSERT INTO creature_loot_template (Entry, Item, Reference, Chance, QuestRequired, LootMode, GroupId, MinCount, MaxCount, Comment) VALUES
+(15298, 20935, 0, 80, 1, 1, 0, 1, 1, 'Tainted Arcane Wraith - Tainted Wraith Essence');

src/IndividualProgressionPlayer.cpp

@@ -130,7 +130,7 @@ public:
         }
     }
 
-    void OnGiveXP(Player* player, uint32& amount, Unit* /*victim*/) override
+    void OnGiveXP(Player* player, uint32& amount, Unit* /*victim*/, uint8 /*xpSource*/) override
     {
         if (!sIndividualProgression->enabled)
         {