cache-tree: use given repo's hash_algo at verify_one()

verify_one() takes a struct repository argument but uses the_hash_algo
internally. Replace it with the provided repo's git_hash_algo, for
consistency. For now, this is mainly a cosmetic change, as all callers
of this function currently only pass the_repository to it.

Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

cache-tree.c

@@ -826,7 +826,7 @@ static void verify_one(struct repository *r,
 			i++;
 		}
 		strbuf_addf(&tree_buf, "%o %.*s%c", mode, entlen, name, '\0');
-		strbuf_add(&tree_buf, oid->hash, the_hash_algo->rawsz);
+		strbuf_add(&tree_buf, oid->hash, r->hash_algo->rawsz);
 	}
 	hash_object_file(tree_buf.buf, tree_buf.len, tree_type, &new_oid);
 	if (!oideq(&new_oid, &it->oid))