Fix stuff from merge

SpigotCore_Main/src/de/steamwar/entity/REntityServer.java

@@ -22,6 +22,7 @@ package de.steamwar.entity;
 import com.comphenix.tinyprotocol.Reflection;
 import com.comphenix.tinyprotocol.TinyProtocol;
 import de.steamwar.core.Core;
+import de.steamwar.core.FlatteningWrapper;
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
 import org.bukkit.entity.Player;
@@ -93,8 +94,11 @@ public class REntityServer implements Listener {
     }
 
     public void setCallback(EntityActionListener callback) {
+        boolean uninitialized = this.callback == null;
         this.callback = callback;
-        TinyProtocol.instance.addFilter(useEntity, filter);
+
+        if(uninitialized)
+            TinyProtocol.instance.addFilter(useEntity, filter);
     }
 
     public void addPlayer(Player player) {
@@ -261,7 +265,7 @@ public class REntityServer implements Listener {
     }
 
     private int viewRadius(Player player) {
-        return player.getClientViewDistance() / 2;
+        return FlatteningWrapper.impl.getViewDistance(player) / 2;
     }
 
     private long entityToId(REntity entity) {