lists issue

[Arvin Gan]

Hi all,
   There may be an issue  in blow function when deleted the node is the first one, that mean n->prev is NULL....., similarly, same issue as the last one node is deleted.

LIST_INLINE void
rem_node(node *n)
{
  node *z = n->prev;
  node *x = n->next;

   z->next = x;
   x->prev = z;
   n->next = NULL;
   n->prev = NULL;
}

Thanks
Arvin
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