return False (0) on error vs return 0 on success (fd_close_posix)

int fd_close_posix(struct connection_struct *conn, files_struct *fsp)
[....]
		if (!add_fd_to_close_entry(fsp)) {
			SAFE_FREE(entries);
			return False;
		}

		SAFE_FREE(entries);
		fsp->fd = -1;
		return 0;