Clarify the use of these functions, to avoid the case where a chooser is

Clarify the use of these functions, to avoid the case where a chooser is

2006-06-19  Federico Mena Quintero  <federico@novell.com>

	* gtk/gtkfilechooser.c (gtk_file_chooser_get_current_folder)
	(gtk_file_chooser_get_current_folder_uri): Clarify the use of
	these functions, to avoid the case where a chooser is in
	SELECT_FOLDER mode and people mistakenly use _get_current_folder()
	to get the selection:  they should use _get_filename() instead.