rem: CHECK(*handle);
context: iptc_zero_entries(const ipt_chainlabel chain, iptc_handle_t *handle){	unsigned int i, end;	struct chain_cache *c;	CHECK(*handle);	if (!(c = find_label(chain, *handle))) {		errno = ENOENT;		return 0;	}	i = entry2index(*handle, c->start);	end = entry2index(*handle, c->end);	for (; i <= end; i++) {		if ((*handle)->counter_map[i].maptype ==COUNTER_MAP_NORMAL_MAP)			(*handle)->counter_map[i].maptype = COUNTER_MAP_ZEROED;	}	set_changed(*handle);	CHECK(*handle);	return 1;}