refs: pass NULL to refs_resolve_ref_unsafe() if hash is not needed

This allows us to get rid of two write-only variables, one of them
being a SHA1 buffer.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/worktree.c b/worktree.c
index 8aaeea0..7001562 100644
--- a/worktree.c
+++ b/worktree.c
@@ -307,7 +307,6 @@ const struct worktree *find_shared_symref(const char *symref,
 	for (i = 0; worktrees[i]; i++) {
 		struct worktree *wt = worktrees[i];
 		const char *symref_target;
-		unsigned char sha1[20];
 		struct ref_store *refs;
 		int flags;
 
@@ -327,7 +326,7 @@ const struct worktree *find_shared_symref(const char *symref,
 
 		refs = get_worktree_ref_store(wt);
 		symref_target = refs_resolve_ref_unsafe(refs, symref, 0,
-							sha1, &flags);
+							NULL, &flags);
 		if ((flags & REF_ISSYMREF) && !strcmp(symref_target, target)) {
 			existing = wt;
 			break;