[PATCH 07/10] builtin-archive: mark unused prefix "unused_prefix"

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

cmd_archive() is registered without RUN_SETUP so its prefix
will be NULL forever. Let's make that clear.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 builtin-archive.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/builtin-archive.c b/builtin-archive.c
index c2e0c1e..84405df 100644
--- a/builtin-archive.c
+++ b/builtin-archive.c
@@ -236,11 +236,12 @@ static const char *extract_remote_arg(int *ac, const char **av)
 	return remote;
 }
 
-int cmd_archive(int argc, const char **argv, const char *prefix)
+int cmd_archive(int argc, const char **argv, const char *unused_prefix)
 {
 	struct archiver ar;
 	int tree_idx;
 	const char *remote = NULL;
+	const char *prefix;
 
 	remote = extract_remote_arg(&argc, argv);
 	if (remote)
@@ -250,9 +251,8 @@ int cmd_archive(int argc, const char **argv, const char *prefix)
 
 	memset(&ar, 0, sizeof(ar));
 	tree_idx = parse_archive_args(argc, argv, &ar);
-	if (prefix == NULL)
-		prefix = setup_git_directory();
 
+	prefix = setup_git_directory();
 	argv += tree_idx;
 	parse_treeish_arg(argv, &ar.args, prefix);
 	parse_pathspec_arg(argv + 1, &ar.args);
-- 
1.5.4.2.281.g28d0e