network,ndisc: use ndisc_captive_portal_free() at one more place

Fixes another memleak introduced by 64de00c49fde341d09b817164fe8cc8f7da46268.
Fixes #28283.

diff --git a/src/network/networkd-ndisc.c b/src/network/networkd-ndisc.c
index 765e68c263538b05dfaad241eb3a453d292a07bb..de7d3e6dfa71432153e6f1c3b77339d5f468f9ba 100644 (file)
--- a/src/network/networkd-ndisc.c
+++ b/src/network/networkd-ndisc.c
@@ -1004,7 +1004,7 @@ static int ndisc_drop_outdated(Link *link, usec_t timestamp_usec) {
                 if (cp->lifetime_usec >= timestamp_usec)
                         continue; /* the captive portal is still valid */
 
-                free(set_remove(link->ndisc_captive_portals, cp));
+                ndisc_captive_portal_free(set_remove(link->ndisc_captive_portals, cp));
                 updated = true;
         }