scan_tree
scan_tree(s, (ct_data *)s->dyn_ltree, s->l_desc.max_code);
scan_tree(s, (ct_data *)s->dyn_dtree, s->d_desc.max_code);
if (scan_tree(dp->dp_left, saddr))
if (scan_tree(dp->dp_right, saddr))
int scan_tree(struct dirlist *, in_addr_t);
(defset && scan_tree(ep->ex_defdir, saddr) == 0 &&
scan_tree(ep->ex_dirl, saddr) == 0))) {
scan_tree(s, (ct_data *)s->dyn_ltree, s->l_desc.max_code);
scan_tree(s, (ct_data *)s->dyn_dtree, s->d_desc.max_code);