refs: pass NULL to resolve_ref_unsafe() if hash is not needed
This allows us to get rid of some write-only variables, among them seven
SHA1 buffers.
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin/commit.c b/builtin/commit.c
index 58f9747..39d5b7f 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -1431,7 +1431,6 @@ static void print_summary(const char *prefix, const struct object_id *oid,
struct rev_info rev;
struct commit *commit;
struct strbuf format = STRBUF_INIT;
- struct object_id junk_oid;
const char *head;
struct pretty_print_context pctx = {0};
struct strbuf author_ident = STRBUF_INIT;
@@ -1484,7 +1483,7 @@ static void print_summary(const char *prefix, const struct object_id *oid,
rev.diffopt.break_opt = 0;
diff_setup_done(&rev.diffopt);
- head = resolve_ref_unsafe("HEAD", 0, junk_oid.hash, NULL);
+ head = resolve_ref_unsafe("HEAD", 0, NULL, NULL);
if (!strcmp(head, "HEAD"))
head = _("detached HEAD");
else
