Core/Player: Fixed cooldowns of DK Runes.

Source/Game/Entities/Player/Player.Fields.cs

@@ -337,17 +337,17 @@ namespace Game.Entities
     {
         public void SetRuneState(byte index, bool set = true)
         {
-            var id = CooldownOrder.LookupByIndex(index);
+            bool foundRune = CooldownOrder.Contains(index);
             if (set)
             {
                 RuneState |= (byte)(1 << index);                      // usable
-                if (id != 0)
-                    CooldownOrder.RemoveAt(index);
+                if (foundRune)
+                    CooldownOrder.Remove(index);
             }
             else
             {
                 RuneState &= (byte)~(1 << index);                     // on cooldown
-                if (id == 0)
+                if (!foundRune)
                     CooldownOrder.Add(index);
             }
         }

Source/Game/Entities/Player/Player.Spells.cs

@@ -17,12 +17,13 @@
 
 using Framework.Constants;
 using Framework.Dynamic;
+using Game.BattlePets;
 using Game.DataStorage;
 using Game.Network.Packets;
 using Game.Spells;
 using System;
 using System.Collections.Generic;
-using Game.BattlePets;
+using System.Linq;
 
 namespace Game.Entities
 {
@@ -1818,7 +1819,6 @@ namespace Game.Entities
             m_spells.Remove(spellId);
         }
 
-
         public void UpdateZoneDependentAuras(uint newZone)
         {
             // Some spells applied at enter into zone (with subzones), aura removed in UpdateAreaDependentAuras that called always at zone.area update
@@ -2865,9 +2865,9 @@ namespace Game.Entities
         {
             m_runes.Cooldown[index] = cooldown;
             m_runes.SetRuneState(index, (cooldown == 0) ? true : false);
-            uint activeRunes = m_runes.Cooldown[Math.Min(GetMaxPower(PowerType.Runes), (int)PowerType.Max)];
+            int activeRunes = m_runes.Cooldown.Count(p => p == 0);
             if (activeRunes != GetPower(PowerType.Runes))
-                SetPower(PowerType.Runes, (int)activeRunes);
+                SetPower(PowerType.Runes, activeRunes);
         }
 
         public byte GetRunesState()