netfilter: ctnetlink: remove useless type conversion to bool

dying is bool, the type conversion to true/false value is not
needed.

Signed-off-by: Bernard Zhao <bernard@vivo.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/nf_conntrack_netlink.c

@@ -1746,7 +1746,7 @@ restart:
 			res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
 						  cb->nlh->nlmsg_seq,
 						  NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
-						  ct, dying ? true : false, 0);
+						  ct, dying, 0);
 			if (res < 0) {
 				if (!atomic_inc_not_zero(&ct->ct_general.use))
 					continue;