Avoid adding elements twice

core/lib/list.c

@@ -43,7 +43,7 @@
  *
  * Author: Adam Dunkels <adam@sics.se>
  *
- * $Id: list.c,v 1.3 2010/03/22 11:29:58 fros4943 Exp $
+ * $Id: list.c,v 1.4 2010/04/30 07:18:24 adamdunkels Exp $
  */
 #include "lib/list.h"
 
@@ -166,6 +166,9 @@ list_push(list_t list, void *item)
 {
   /*  struct list *l;*/
 
+  /* Make sure not to add the same element twice */
+  list_remove(list, item);
+
   ((struct list *)item)->next = *list;
   *list = item;
 }