From f12701e582411381d25a52376248ecfe5b5d68b8 Mon Sep 17 00:00:00 2001
From: "Dylan K. Taylor" <odigiman@gmail.com>
Date: Sun, 24 Sep 2017 10:29:36 +0100
Subject: [PATCH] Fixed possible undefined NBT in Furnace, close #1398

---
 src/pocketmine/tile/Furnace.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/pocketmine/tile/Furnace.php b/src/pocketmine/tile/Furnace.php
index a8fb7c9cf..33960d589 100644
--- a/src/pocketmine/tile/Furnace.php
+++ b/src/pocketmine/tile/Furnace.php
@@ -53,6 +53,10 @@ class Furnace extends Spawnable implements InventoryHolder, Container, Nameable{
 		}
 		if(!isset($nbt->MaxTime)){
 			$nbt->MaxTime = new ShortTag("BurnTime", $nbt->BurnTime->getValue());
+			unset($nbt->BurnTicks);
+		}
+
+		if(!isset($nbt->BurnTicks)){
 			$nbt->BurnTicks = new ShortTag("BurnTicks", 0);
 		}