[IPVS]: Really invalidate persistent templates

Agostino di Salle noticed that persistent templates are not
invalidated due to buggy optimization.

Signed-off-by: Julian Anastasov <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/ipv4/ipvs/ip_vs_conn.c

···
 		/*
 		 * Invalidate the connection template
 		 */
-		if (ct->cport) {
+		if (ct->vport != 65535) {
 			if (ip_vs_conn_unhash(ct)) {
 				ct->dport = 65535;
 				ct->vport = 65535;