[PATCH 4/4] parse-options: simplify parse_options_dup()

["René Scharfe" <l.s.r@web.de>]

Simplify parse_options_dup() by making it a trivial wrapper of
parse_options_concat() by making use of the facts that the latter
duplicates its input as well and that appending an empty set is a no-op.

Signed-off-by: René Scharfe <l.s.r@web.de>
---
 parse-options-cb.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/parse-options-cb.c b/parse-options-cb.c
index 7d56681130..a28b55be48 100644
--- a/parse-options-cb.c
+++ b/parse-options-cb.c
@@ -170,15 +170,9 @@ static size_t parse_options_count(const struct option *opt)

 struct option *parse_options_dup(const struct option *o)
 {
-	const struct option *orig = o;
-	struct option *opts;
-	size_t nr = parse_options_count(o);
-
-	ALLOC_ARRAY(opts, nr + 1);
-	COPY_ARRAY(opts, orig, nr);
-	memset(opts + nr, 0, sizeof(*opts));
-	opts[nr].type = OPTION_END;
-	return opts;
+	struct option no_options[] = { OPT_END() };
+
+	return parse_options_concat(o, no_options);
 }

 struct option *parse_options_concat(const struct option *a,
--
2.25.0