writeln() causes I/O error in GUI app

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Create a record that contains another record.
2. Use a TSuperRttiContext to convert the record to JSON

What is the expected output? What do you see instead?
The subrecord should either be parsed (preferably) or otherwise be ignored.

Instead, you'll arrive on line 7063 
(http://code.google.com/p/superobject/source/browse/trunk/superobject.pas#7063),
 where there's a `writeln` statement. That causes an I/O error in GUI 
applications.


What version of the product are you using? On what operating system?
revision 42

Please provide any additional information below.
For the rest the TSuperRttiContext is a huge timesaver. SuperObject  is awesome.

Original issue reported on code.google.com by woutervannifterick on 24 Feb 2012 at 1:33