refs API: make expand_ref() & repo_dwim_log() not set errno

The use of these two is rather trivial, and it's easy to see none of
their callers care about errno. So let's move them from
refs_resolve_ref_unsafe() to refs_resolve_ref_unsafe_with_errno(),
these were the last two callers, so we can get rid of that wrapper
function.

Signed-off-by: Ævar Arnfjörð Bjarmason <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: avar

refs.c

@@ -654,13 +654,16 @@ int expand_ref(struct repository *repo, const char *str, int len,
 		struct object_id oid_from_ref;
 		struct object_id *this_result;
 		int flag;
+		struct ref_store *refs = get_main_ref_store(repo);
+		int ignore_errno;
 
 		this_result = refs_found ? &oid_from_ref : oid;
 		strbuf_reset(&fullref);
 		strbuf_addf(&fullref, *p, len, str);
-		r = refs_resolve_ref_unsafe(get_main_ref_store(repo),
-					    fullref.buf, RESOLVE_REF_READING,
-					    this_result, &flag);
+		r = refs_werrres_ref_unsafe(refs, fullref.buf,
+					    RESOLVE_REF_READING,
+					    this_result, &flag,
+					    &ignore_errno);
 		if (r) {
 			if (!refs_found++)
 				*ref = xstrdup(r);
@@ -689,12 +692,14 @@ int repo_dwim_log(struct repository *r, const char *str, int len,
 	for (p = ref_rev_parse_rules; *p; p++) {
 		struct object_id hash;
 		const char *ref, *it;
+		int ignore_errno;
 
 		strbuf_reset(&path);
 		strbuf_addf(&path, *p, len, str);
-		ref = refs_resolve_ref_unsafe(refs, path.buf,
+		ref = refs_werrres_ref_unsafe(refs, path.buf,
 					      RESOLVE_REF_READING,
-					      oid ? &hash : NULL, NULL);
+					      oid ? &hash : NULL, NULL,
+					      &ignore_errno);
 		if (!ref)
 			continue;
 		if (refs_reflog_exists(refs, path.buf))