1 files changed, 6 insertions, 0 deletions
diff --git a/player/PlayerActionServer.java b/player/PlayerActionServer.java
index 09d2417..9e126d4 100644
--- a/player/PlayerActionServer.java
+++ b/player/PlayerActionServer.java
@@ -2,6 +2,7 @@ package mahjong.player;
 
 import mahjong.aux.set.Hand;
 import mahjong.engine.Action;
+import mahjong.tools.Alert;
 
 /**
  * Created by joe on 12/4/14.
@@ -25,13 +26,18 @@ public class PlayerActionServer implements PlayerActionHandler {
         return name;
     }
 
+    @Override
     public Action stateAlert(Action action)
     {
+        Alert.Error(action==null,"Action can't be null in alert");
         return null;
     }
 
+    @Override
     public void stateUpdate(Action action)
     {
+        if (action == null)
+            return;
     }
 
     public int getScore() {