pfctl: avoid unneeded variable in gen_dynnode()

[Klemens Nanni]

OK?

Index: pfctl_parser.c
===================================================================
RCS file: /cvs/src/sbin/pfctl/pfctl_parser.c,v
retrieving revision 1.336
diff -u -p -r1.336 pfctl_parser.c
--- pfctl_parser.c      11 Sep 2018 10:42:10 -0000      1.336
+++ pfctl_parser.c      11 Sep 2018 22:01:41 -0000
@@ -1321,7 +1321,6 @@ struct node_host *
 gen_dynnode(struct node_host *h, sa_family_t af)
 {
        struct node_host        *n;
-       struct pf_addr          *m;
 
        if (h->addr.type != PF_ADDR_DYNIFTL)
                return (NULL);
@@ -1334,8 +1333,7 @@ gen_dynnode(struct node_host *h, sa_fami
        n->tail = NULL;
 
        /* fix up netmask */
-       m = &n->addr.v.a.mask;
-       if (af == AF_INET && unmask(m) > 32)
+       if (af == AF_INET && unmask(&n->addr.v.a.mask) > 32)
                set_ipmask(n, 32);
 
        return (n);