Finish resetting the list on delete

src/ordinary.c

@@ -16,6 +16,11 @@ void ordinary_list_delete(struct ordinary_list *list) {
     free(node); // R.I.P.
     node = next;
   }
+
+  list->head = NULL;
+  list->tail = NULL;
+  list->count = 0;
+  list->limit = 0;
 }
 
 uint8_t ordinary_list_empty(struct ordinary_list *list) {