From c9fd6b4b931ce2ff4dd0255c4e86b6b64c2b7167 Mon Sep 17 00:00:00 2001
From: "Kristian S. Stangeland" <kr_stang@hotmail.com>
Date: Sat, 23 Nov 2013 05:01:52 +0100
Subject: [PATCH] Avoid item stack IDs if we can.

---
 .../java/com/comphenix/protocol/wrappers/nbt/NbtFactory.java   | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/nbt/NbtFactory.java b/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/nbt/NbtFactory.java
index d2810b55..917b7c09 100644
--- a/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/nbt/NbtFactory.java
+++ b/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/nbt/NbtFactory.java
@@ -24,6 +24,7 @@ import java.util.Map;
 
 import javax.annotation.Nonnull;
 
+import org.bukkit.Material;
 import org.bukkit.inventory.ItemStack;
 
 import com.comphenix.protocol.reflect.FieldAccessException;
@@ -162,7 +163,7 @@ public class NbtFactory {
 			throw new IllegalArgumentException("Stack cannot be NULL.");
 		if (!MinecraftReflection.isCraftItemStack(stack))
 			throw new IllegalArgumentException("Stack must be a CraftItemStack.");
-		if (stack.getTypeId() == 0)
+		if (stack.getType() == Material.AIR)
 			throw new IllegalArgumentException("ItemStacks representing air cannot store NMS information.");
 	}