From e740e7577a70ee3eb0f090e1816ffdda76e5e722 Mon Sep 17 00:00:00 2001
From: Florent gravin <florent.gravin@camptocamp.com>
Date: Tue, 18 Sep 2018 14:57:59 +0200
Subject: [PATCH] Secure type of HTMLImageElement in ImageTile

---
 src/ol/ImageTile.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/ol/ImageTile.js b/src/ol/ImageTile.js
index dcf604787c..bb172b07e6 100644
--- a/src/ol/ImageTile.js
+++ b/src/ol/ImageTile.js
@@ -114,7 +114,8 @@ class ImageTile extends Tile {
    * @private
    */
   handleImageLoad_() {
-    if (this.image_.naturalWidth && this.image_.naturalHeight) {
+    if (this.image_ instanceof HTMLImageElement &&
+      this.image_.naturalWidth && this.image_.naturalHeight) {
       this.state = TileState.LOADED;
     } else {
       this.state = TileState.EMPTY;