route: Add #endif comment for uncrustify compliance

Cherry-pick dca6b03098
broke uncrustify compliance. Apparently this one added
line pushed it over the limit to require the #endif
comment.

Change-Id: I46d0e4be82a5cc7e466d6e8f658e5b131b5401c4
Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1284
Message-Id: <20251017205730.8450-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg33428.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>

src/openvpn/route.c

@@ -2368,7 +2368,7 @@ delete_route_ipv6(const struct route_ipv6 *r6, const struct tuntap *tt,
     {
         gateway_needed = true;
     }
-#endif
+#endif /* ifndef _WIN32 */
 
     struct gc_arena gc = gc_new();
     struct argv argv = argv_new();