sac2c dies in wltransform due to illegal node structure access

Bugzilla Link	604
Created on	Nov 22, 2009 12:04
Resolution	FIXED
Resolved on	Nov 23, 2009 11:43
Version	1.00beta
OS	Linux
Architecture	All
Attachments	bug22.sac

Extended Description

Created an attachment (id=610)
code to reproduce failure
When compiling the soon to be attached code, sac2c dies in wltransform in 
function CompareWlTrees. The access via WLNODE_STEP goes bust as the current
node of type wlgrid has no step attribute. I assume this is a systematic 
problem of the new wltransform and not specific to the current code, hence
the high severity.