Fix lobbyconnection on disconnect

Signed-off-by: Lixfel <agga-games@gmx.de>

src/de/steamwar/bungeecore/listeners/ConnectionListener.java

@@ -105,6 +105,9 @@ public class ConnectionListener extends BasicListener {
     @EventHandler
     public void onServerKickEvent(ServerKickEvent ev)
     {
+        if(!ev.getPlayer().isConnected())
+            return;
+
         ServerInfo kickedFrom;
 
         if (ev.getPlayer().getServer() != null){