cocci: apply the "object-store.h" part of "the_repository.pending"

Apply the part of "the_repository.pending.cocci" pertaining to
"object-store.h".

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

fmt-merge-msg.c

@@ -520,7 +520,8 @@ static void fmt_merge_msg_sigs(struct strbuf *out)
 		struct object_id *oid = origins.items[i].util;
 		enum object_type type;
 		unsigned long size;
-		char *buf = read_object_file(oid, &type, &size);
+		char *buf = repo_read_object_file(the_repository, oid, &type,
+						  &size);
 		char *origbuf = buf;
 		unsigned long len = size;
 		struct signature_check sigc = { NULL };