config: mark unused callback parameters

The callback passed to git_config() must conform to a particular
interface. But most callbacks don't actually look at the extra "void
*data" parameter. Let's mark the unused parameters to make
-Wunused-parameter happy.

Note there's one unusual case here in get_remote_default() where we
actually ignore the "value" parameter. That's because it's only checking
whether the option is found at all, and not parsing its value.

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

1 files changed, 2 insertions, 1 deletions

diff --git a/archive-tar.c b/archive-tar.c
index 3d77e0f750..45e5d91407 100644
--- a/archive-tar.c
+++ b/archive-tar.c
@@ -366,7 +366,8 @@ static struct archiver *find_tar_filter(const char *name, size_t len)
 	return NULL;
 }
 
-static int tar_filter_config(const char *var, const char *value, void *data)
+static int tar_filter_config(const char *var, const char *value,
+			     void *UNUSED(data))
 {
 	struct archiver *ar;
 	const char *name;