From 13b6d6d5ae2eeac2845073b70c78d1ce41a27472 Mon Sep 17 00:00:00 2001
From: Seth Berrier <berriers@uwstout.edu>
Date: Thu, 31 Oct 2019 16:03:48 -0500
Subject: [PATCH] Fix for bug related to Issue #4737 - When removing a layer
 from a tilemap, layerIndex can become invalid - Added loop to fix any
 existing tilemapLayer.layerIndex vales

---
 src/tilemaps/Tilemap.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/tilemaps/Tilemap.js b/src/tilemaps/Tilemap.js
index 54bba4b10..2867fcff6 100644
--- a/src/tilemaps/Tilemap.js
+++ b/src/tilemaps/Tilemap.js
@@ -1564,6 +1564,13 @@ var Tilemap = new Class({
         if (index !== null)
         {
             SpliceOne(this.layers, index);
+            for (var i = index; i < this.layers.length; i++)
+            {
+                if (this.layers[i].tilemapLayer)
+                {
+                    this.layers[i].tilemapLayer.layerIndex--;
+                }
+            }
 
             if (this.currentLayerIndex === index)
             {