Fixes bug #317999:

Fixes bug #317999:

2005-10-07  Federico Mena Quintero  <federico@ximian.com>

	Fixes bug #317999:

	* tests/autotestfilechooser.c (test_reload_sequence): Ensure that
	the the result of gtk_file_chooser_get_folder() is NULL or
	non-NULL at the right times.  Log the tests.
	(test_button_folder_states): New test for the initial states of
	the current folder in GtkFileChooserButton.
	(main): Test that the number of warnings/errors/critical errors is
	zero.

	* gtk/gtkfilechooser.c (gtk_file_chooser_get_current_folder):
	Clarify the documentation on when this can return NULL.
	(gtk_file_chooser_get_current_folder_uri): Likewise.

	* gtk/gtkfilechooserbutton.c (struct
	_GtkFileChooserButtonPrivate): Added a folder_has_been_set flag;
	we use it to keep track of whether a folder has been set.
	(gtk_file_chooser_button_map):  Implement.  If no folder has been
	loaded before, we at least try to load $cwd here.
	(gtk_file_chooser_button_constructor): If the construct-time
	dialog already has a folder set, turn on our folder_has_been_set
	flag.
	(dialog_current_folder_changed_cb): Turn on our
	folder_has_been_set flag.