Putting 'checking_lambda_expression' on the right place and deleting 'freevars_boundvars_constants_of'.

git-svn-id: http://gapt.googlecode.com/svn/trunk/source@1573 85d21ef8-add0-11de-ae77-5bfb9c5a3f34
added failing parse example for issue 242

git-svn-id: http://gapt.googlecode.com/svn/trunk/source@1574 85d21ef8-add0-11de-ae77-5bfb9c5a3f34