Fix piston boundary

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

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

@@ -24,6 +24,7 @@ import de.steamwar.fightsystem.Config;
 import de.steamwar.fightsystem.states.FightState;
 import de.steamwar.fightsystem.states.StateDependentListener;
 import org.bukkit.block.Block;
+import org.bukkit.block.BlockFace;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
 import org.bukkit.event.block.BlockPistonExtendEvent;
@@ -41,8 +42,9 @@ public class PistonListener implements Listener {
 
     @EventHandler
     public void handlePistonExtend(BlockPistonExtendEvent e){
+        BlockFace face = e.getDirection();
         for(Block block : e.getBlocks()){
-            if(!Config.BlueExtendRegion.inRegion(block) && !Config.RedExtendRegion.inRegion(block)){
+            if(!Config.BlueExtendRegion.inRegion(block.getRelative(face)) && !Config.RedExtendRegion.inRegion(block.getRelative(face))){
                 e.setCancelled(true);
                 return;
             }