From bcd75789d524e3e618ac02ed99f55321ea78ea24 Mon Sep 17 00:00:00 2001
From: George Oikonomou <george@contiki-ng.org>
Date: Sat, 16 Dec 2017 01:15:25 +0000
Subject: [PATCH] Make sure we don't add the same item twice

Fixes #254
---
 os/lib/list.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/os/lib/list.c b/os/lib/list.c
index 605fe9c53..afa9df585 100644
--- a/os/lib/list.c
+++ b/os/lib/list.c
@@ -302,7 +302,7 @@ list_insert(list_t list, void *previtem, void *newitem)
   if(previtem == NULL) {
     list_push(list, newitem);
   } else {
-  
+    list_remove(list, newitem);
     ((struct list *)newitem)->next = ((struct list *)previtem)->next;
     ((struct list *)previtem)->next = newitem;
   }