ifconfig.c redundancy the second

[Mathias Koehler]

I hope the following message is a format more helpful for you
guys. (Thanks to Otto Moerbeek who gave me a hint.)
Again my question is how should that code look like?
Because I can remove the 'if' and the code still does the same.

===================================================================
RCS file: /cvs/src/sbin/ifconfig/ifconfig.c,v
retrieving revision 1.460
diff -u -p -u -p -r1.460 ifconfig.c
--- ifconfig.c  18 Dec 2022 18:56:38 -0000      1.460
+++ ifconfig.c  13 Jan 2023 18:52:48 -0000
@@ -1907,12 +1907,14 @@ delifjoinlist(const char *val, int d)
        memset(&join, 0, sizeof(join));
        join.i_flags |= (IEEE80211_JOIN_DEL | IEEE80211_JOIN_DEL_ALL);

+       /%
        if (d == -1) {
                ifr.ifr_data = (caddr_t)&join;
                if (ioctl(sock, SIOCS80211JOIN, (caddr_t)&ifr) == -1)
                        err(1, "SIOCS80211JOIN");
                return;
        }
+       %/

        ifr.ifr_data = (caddr_t)&join;
        if (ioctl(sock, SIOCS80211JOIN, (caddr_t)&ifr) == -1)