Hotfix inventory

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

FightSystem_Core/src/de/steamwar/fightsystem/listener/InFightInventory.java

@@ -30,8 +30,14 @@ import org.bukkit.event.inventory.InventoryClickEvent;
 import org.bukkit.event.inventory.InventoryDragEvent;
 import org.bukkit.event.inventory.InventoryType;
 
+import java.util.Collections;
+import java.util.EnumSet;
+import java.util.Set;
+
 public class InFightInventory implements Listener {
 
+    private static final Set<Material> allowed = Collections.unmodifiableSet(EnumSet.of(Material.TNT, Material.AIR));
+
     public InFightInventory() {
         new StateDependentListener(ArenaMode.AntiReplay, FightState.Ingame, this);
     }
@@ -42,7 +48,7 @@ public class InFightInventory implements Listener {
         if(top == InventoryType.CRAFTING)
             return;
 
-        if ((event.getCursor() != null && event.getCursor().getType() != Material.TNT) || (event.getCurrentItem() != null && event.getCurrentItem().getType() != Material.TNT))
+        if ((event.getCursor() != null && !allowed.contains(event.getCursor().getType())) || (event.getCurrentItem() != null && !allowed.contains(event.getCurrentItem().getType())))
             event.setCancelled(true); // Deny if transferred item is not TNT
     }