[racket] scheme_call_enable_break

At Sun, 21 Apr 2013 11:05:01 -0600, Matthew Flatt wrote:
>  (define MZFD_CHECK_READ 3)

Use

 (define MZFD_CREATE_READ 1)

instead of MZFD_CHECK_READ.

An advantage of writing documentation is that it reminds me how the
function works.