Core/DBLayer: Convert PQuery() queries to prepared statements

src/server/game/Pools/PoolMgr.cpp

@@ -440,7 +440,12 @@ void PoolGroup<Quest>::SpawnObject(ActivePoolData& spawns, uint32 limit, uint32
     // load state from db
     if (!triggerFrom)
     {
-        QueryResult result = CharacterDatabase.PQuery("SELECT quest_id FROM pool_quest_save WHERE pool_id = %u", poolId);
+        PreparedStatement* stmt = CharacterDatabase.GetPreparedStatement(CHAR_SEL_POOL_QUEST_SAVE);
+
+        stmt->setUInt32(0, poolId);
+
+        PreparedQueryResult result = CharacterDatabase.Query(stmt);
+
         if (result)
         {
             do