rem: + sizeof(struct ipt_entry_target)
add: + IPT_ALIGN(sizeof(struct ipt_entry_target))
context: make_delete_mask(struct ipt_entry *fw){	/* Establish mask for comparison */	unsigned int size;	struct iptables_match *m;	unsigned char *mask, *mptr;	size = sizeof(struct ipt_entry);	for (m = iptables_matches; m; m = m->next)		size += sizeof(struct ipt_entry_match) + m->size;	mask = fw_calloc(1, size			 + sizeof(struct ipt_entry_target)			 + iptables_targets->size);	memset(mask, 0xFF, sizeof(struct ipt_entry));	mptr = mask + sizeof(struct ipt_entry);	for (m = iptables_matches; m; m = m->next) {		memset(mptr, 0xFF,		       sizeof(struct ipt_entry_match) + m->userspacesize);		mptr += sizeof(struct ipt_entry_match) + m->size;	}	memset(mptr, 0xFF, sizeof(struct ipt_entry_target));	mptr += sizeof(struct ipt_entry_target);	memset(mptr, 0xFF, iptables_targets->userspacesize);	return mask;}