radnode_last_in_subtree_incl_self
struct radnode* s = radnode_last_in_subtree_incl_self(
*result = radnode_last_in_subtree_incl_self(n);
*result = radnode_last_in_subtree_incl_self(n->array[byte].node);
if((*result=radnode_last_in_subtree_incl_self(n))==0)
*result=radnode_last_in_subtree_incl_self(n->array[byte].node);
*result=radnode_last_in_subtree_incl_self(n->array[byte].node);
return radnode_last_in_subtree_incl_self(rt->root);