From 0d978fdf33e7b5dc7e2d5d02fbe32ed94f038180 Mon Sep 17 00:00:00 2001
From: Och Noe <och_noe@forksworld.de>
Date: Tue, 11 May 2021 19:45:15 +0200
Subject: [PATCH] don't overwrite waypoints while setting

---
 init.lua | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/init.lua b/init.lua
index c19d38b..712edfc 100644
--- a/init.lua
+++ b/init.lua
@@ -327,6 +327,13 @@ minetest.register_chatcommand('wp_set', {
     func = safe(function(param)
         waypoints = load_waypoints()
         local point = minetest.localplayer:get_pos()
+        if waypoints[param] then
+	   minetest.display_chat_message(
+		 ('waypoint "%s" not saved: already set'):format(param)
+				      )
+	   return
+	end
+	   
         waypoints[param] = point
         mod_storage:set_string('waypoints', minetest.serialize(waypoints))