FIX: if we have functions without parameter list, we get an emptry string as subtree instead of FALSE. This results in an error within the creator.
FIX: if we have functions without parameter list, we get an emptry string as subtree instead of FALSE. This results in an error within the creator.

git-svn-id: d43baad71f2d016b00431dbc03dbdc7f66602618@215 44dcfd11-89b7-3d55-2063-5c365055f77f

secondtruth/PHP-SQL-Parser,rezonant/PHP-SQL-Parser,oger000/PHP-SQL-Parser,noisecapella/PHP-SQL-Parser,greenlion/PHP-SQL-Parser,rezonant/PHP-SQL-Parser,greenlion/PHP-SQL-Parser