[CM] Let formatted incorrectly

[bil at ccrma.Stanford.EDU]

Thanks for the bug report!  I think that way of fixing the
bug messes up some error messages (wrong type argument errors). Perhaps 
this will work:

line 35958 (in slot_to_port)
object_to_port_with_circle_check(sc, slot_value(obj), port, 
not_p_display(use_write), ci);

This is how hash_table_to_port and others handle it.
Thanks again.