Setting mainCountdown when entern

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

FightSystem_Main/src/de/steamwar/fightsystem/FightSystem.java

@@ -155,7 +155,7 @@ public class FightSystem extends JavaPlugin {
         setAllPlayersGM(GameMode.SURVIVAL);
 
         if(Config.Entern)
-            new EnternCountdown();
+            mainCountdown = new EnternCountdown();
 
         WaterRemover.init();
         Bukkit.broadcastMessage(PREFIX + "§aArena freigegeben!");