correction double.c

Chains_across_the_Island/Fundamentals/double/double.c

@@ -32,7 +32,7 @@ int dlist_insert(struct dlist **l, size_t index, int e)
         new_node->prev = NULL;
         new_node->next = *l;
         new_node->data = e;
-        new_node->next->prev = new_node;
+        //new_node->next->prev = new_node;
 
         //dlist_append(*l, e);
         return 0;