From 8fdc4cc9fc5653994ea0663e461001f856ff3420 Mon Sep 17 00:00:00 2001
From: Frederic Junod <frederic.junod@camptocamp.com>
Date: Mon, 3 Sep 2018 15:25:31 +0200
Subject: [PATCH] Change property test in MousePosition options

TypeScript doesn't like the current implementation:
```
src/ol/control/MousePosition.js(82,64): error TS2339: Property 'undefinedHTML' does not exist on type 'never'.
```
---
 src/ol/control/MousePosition.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ol/control/MousePosition.js b/src/ol/control/MousePosition.js
index 680a2120a8..97684cb8e2 100644
--- a/src/ol/control/MousePosition.js
+++ b/src/ol/control/MousePosition.js
@@ -79,7 +79,7 @@ class MousePosition extends Control {
      * @private
      * @type {string}
      */
-    this.undefinedHTML_ = 'undefinedHTML' in options ? options.undefinedHTML : '&#160;';
+    this.undefinedHTML_ = options.undefinedHTML !== undefined ? options.undefinedHTML : '&#160;';
 
     /**
      * @private