daemon: mark unused parameters in non-posix fallbacks

If NO_POSIX_GOODIES is set, we compile fallback versions of a few
functions. These don't do anything, so their parameters are unused, but
we must keep them to match the ones on the other side of the #ifdef.
Mark them to quiet -Wunused-parameter.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: peff

daemon.c

@@ -1175,13 +1175,13 @@ static int service_loop(struct socketlist *socklist)
 
 struct credentials;
 
-static void drop_privileges(struct credentials *cred)
+static void drop_privileges(struct credentials *cred UNUSED)
 {
 	/* nothing */
 }
 
-static struct credentials *prepare_credentials(const char *user_name,
-    const char *group_name)
+static struct credentials *prepare_credentials(const char *user_name UNUSED,
+					       const char *group_name UNUSED)
 {
 	die("--user not supported on this platform");
 }