From 29530919b5f17dfda148e6d3e62646c8dc2c4d6c Mon Sep 17 00:00:00 2001
From: Henrik Fehlauer <rkflx@lab12.net>
Date: Sat, 6 Jun 2020 18:00:00 +0000
Subject: [PATCH] Stop deleting points once there are no more points left

Prevents "Uncaught TypeError: Cannot read property 'off' of null"
in L.Routing.js
---
 js/plugin/Routing.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/js/plugin/Routing.js b/js/plugin/Routing.js
index 38005f4..f0ee5ab 100644
--- a/js/plugin/Routing.js
+++ b/js/plugin/Routing.js
@@ -378,7 +378,9 @@ BR.Routing = L.Routing.extend({
     },
 
     deleteLastPoint: function() {
-        this.removeWaypoint(this.getLast(), function(err, data) {});
+        if ((lastPoint = this.getLast())) {
+            this.removeWaypoint(lastPoint, function(err, data) {});
+        }
     },
 
     _removeDistanceMarkers: function() {