[saga-rg] open_flag and open_dir_flags

Hi, The relationship between the enumerations open_flag and open_dir_flags in the various packages of the API is a little problematic. Graeme -3.35 How should interfaces inheriting from ns_directory and ns_entry inherit/override the enumerations open_flag and open_dir_flags? The methods of ns_directory open_dir() and open() will require the enumerations defined in the name_space package (or sub-classes of these enumerations). With Java enumerations it would be possible to extend the original enumerations by sub-classing, but it is not possible to not remove fields. Unfortunately saga.logical_file.open_flags removes fields from saga.name_space.open_flags.