Check syntax

[Zbyszek Jurkiewicz <zbyszek@duch.mimuw.edu.pl>]

The syntax checker in DrScheme has troubles with macros,
e.g. does not unterstand class/d giving for the first
definition "definition: invalid position for internal 
definition" and stopping without checking anything.
Similar behavior with opt-lambda.

However, files load without problem (e.g. using
"Execute" button) and work.

Question: should I turn on some flag or do some
other action?

Regards,

Zbyszek Jurkiewicz
University of Warsaw