Fix null pointer (#183)

Game/AI/Decks/LabrynthExecutor.cs

@@ -1713,6 +1713,8 @@ namespace WindBot.Game.AI.Decks
                         enemySetThisTurn.Add(card);
                 }
             }
+            if (card != null)
+            {
                 if (previousControler == 0)
                 {
                     if (previousLocation == (int)CardLocation.MonsterZone && currentLocation != (int)CardLocation.MonsterZone)
@@ -1729,7 +1731,7 @@ namespace WindBot.Game.AI.Decks
                 {
                     ClientCard currentSolvingChain = Duel.GetCurrentSolvingChainCard();
                     if (currentLocation == (int)CardLocation.SpellZone && (currentSolvingChain == null || !currentSolvingChain.IsCode(CardId.AriasTheLabrynthButler))
-                    && card != null && (card.HasType(CardType.Trap) || card.IsCode(CardId.WelcomeLabrynth, CardId.BigWelcomeLabrynth))
+                        && (card.HasType(CardType.Trap) || card.IsCode(CardId.WelcomeLabrynth, CardId.BigWelcomeLabrynth))
                     )
                     {
                         Logger.DebugWriteLine("[setTrapThisTurn]set " + card.Name ?? "UnknowCard");
@@ -1749,6 +1751,7 @@ namespace WindBot.Game.AI.Decks
                         }
                     }
                 }
+            }
 
             base.OnMove(card, previousControler, previousLocation, currentControler, currentLocation);
         }