From 1bab8dc42fd9eab52d6a3cb8426baba925c8af2d Mon Sep 17 00:00:00 2001
From: Gonk <chris@zink.tv>
Date: Fri, 1 May 2020 20:17:29 +0200
Subject: [PATCH] Fix for ResourcesCompactor

---
 hacked-libtiled/tiled/io/TMXMapWriter.java | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hacked-libtiled/tiled/io/TMXMapWriter.java b/hacked-libtiled/tiled/io/TMXMapWriter.java
index 1c42fa3..775e759 100644
--- a/hacked-libtiled/tiled/io/TMXMapWriter.java
+++ b/hacked-libtiled/tiled/io/TMXMapWriter.java
@@ -241,7 +241,7 @@ public class TMXMapWriter
         } else {
             w.startElement("tileset");
             w.writeAttribute("firstgid", getFirstGidForTileset(set));
-			if (set.sheet.parent.getDataType() == Type.source) {
+			if (set.sheet != null && set.sheet.parent.getDataType() == Type.source) {
 				String fileName = set.getName();
 				if (fileName.length() > 3 && !(fileName.substring(fileName.length() - 4).equalsIgnoreCase(".png"))) {
 					fileName += ".png";
@@ -290,7 +290,7 @@ public class TMXMapWriter
 
         if (tileBitmapFile != null) {
             w.startElement("image");
-			if (set.sheet.parent.getDataType() == Type.source) {
+			if (set.sheet != null && set.sheet.parent.getDataType() == Type.source) {
 				String fileName = set.getName();
 				if (fileName.length() > 3 && !(fileName.substring(fileName.length() - 4).equalsIgnoreCase(".png"))) {
 					fileName += ".png";