/* If buf is a 'hidden' buffer (i.e. one whose name starts with
a space), try to find another one. */
if (XSTRING (Fbuffer_name (buf))->data[0] == ' ')
- buf = Fother_buffer (buf);
+ buf = Fother_buffer (buf, Qnil);
Fset_window_buffer (root_window, buf);
}