mjsousa [Tue, 20 May 2014 08:25:59 +0100] rev 892
Check VAR_EXTERN variables declared in FBs instantiated in a Program (and recursively too - FBs in FBs).
mjsousa [Tue, 20 May 2014 08:24:25 +0100] rev 891
Fix typo in as yet dormant code (related to REF_TO keyword, that is not yet active)