parse-options: mark unused parameters in noop callback

Unsurprisingly, the noop options callback doesn't bother to look at any
of its parameters. Let's mark them so that -Wunused-parameter does not
complain.

Another option would be to drop the callback and have parse-options
itself recognize OPT_NOOP_NOARG. But that seems like extra work for no
real benefit.

Signed-off-by: Jeff King <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: peff

parse-options-cb.c

@@ -227,7 +227,9 @@ int parse_opt_strvec(const struct option *opt, const char *arg, int unset)
 	return 0;
 }
 
-int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
+int parse_opt_noop_cb(const struct option *opt UNUSED,
+		      const char *arg UNUSED,
+		      int unset UNUSED)
 {
 	return 0;
 }