From b535a7ca4606d05589f7903187897bf2262cd2b2 Mon Sep 17 00:00:00 2001
From: Sirse <sirse.box@gmail.com>
Date: Wed, 27 Dec 2017 11:53:20 +0700
Subject: [PATCH] Validate ItemFieldKit to avoid metadata manipulations with
 items. (#375)

---
 src/main/java/binnie/core/craftgui/WindowFieldKit.java | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/main/java/binnie/core/craftgui/WindowFieldKit.java b/src/main/java/binnie/core/craftgui/WindowFieldKit.java
index 5bae9a7e..1d78b669 100644
--- a/src/main/java/binnie/core/craftgui/WindowFieldKit.java
+++ b/src/main/java/binnie/core/craftgui/WindowFieldKit.java
@@ -213,6 +213,10 @@ public class WindowFieldKit extends Window {
 		super.onWindowInventoryChanged();
 		if (isServer()) {
 			ItemStack kit = getPlayer().getHeldItem();
+			if(kit == null || !kit.getItem().equals(BinnieCore.fieldKit)) {
+				return;
+			}
+
 			int sheets = 64 - kit.getItemDamage();
 			int size = (getWindowInventory().getStackInSlot(1) == null) ? 0 : getWindowInventory().getStackInSlot(1).stackSize;
 			if (sheets != size) {