* partial fix for Mantis #30831 (partial, because no exception has been encountered yet): when checking whether the left node of a vmtaddrnode is a generic, don't rely on df_generic, but instead use is_generic which checks for a true generic (the other will also be true if it's merely a structured type declared (or specialized) inside another generic)
+ added test

git-svn-id: trunk@34915 -