2001-01-14  Michael Natterer  <mitch@gimp.org>

	* app/docindex.c
	* app/fileops.c
	* app/gdisplay.c
	* app/gimpimage.[ch]:

	Removed the "has_filename" boolean from GimpImage:

	- to get the filename, ask for GimpObjects's name.
	- gimp_image_filename() returns the *display* filename (and will be
	  renamed to gimp_image_display_name() soon), i.e. returns
	  "Unnamed" if object->name == NULL.
	- no need any more to check if the filename is the "" string because
	  GimpImage overrides GimpObject's "name_changed" method and
	  sets the name to NULL if it was "".