Fixes #136185, patch by Morten Welinder, with some changes.

Fixes #136185, patch by Morten Welinder, with some changes.

2004-03-14  Federico Mena Quintero  <federico@ximian.com>

	Fixes #136185, patch by Morten Welinder, with some changes.

	* gtk/gtkfilechooserdefault.c (check_is_folder): New helper function.
	(shortcuts_insert_path): Check the path first with check_is_folder().
	(gtk_file_chooser_default_set_current_folder): Likewise.
	(gtk_file_chooser_default_add_shortcut_folder): Likewise.
	(browse_widgets_create): Unref the size group.

	* gtk/gtkfilesystemunix.c (gtk_file_system_unix_get_folder):
	Handle the case where the file exists but it is not a directory.
	(IconType): Add value for ICON_UNDECIDED.
	(struct stat_info_entry): New structure to hold a file's struct
	stat, its MIME type and its icon type.
	(struct _GtkFileFolderUnix): Added a hash of struct
	stat_info_entry, and flags to remember which info types we've read
	so far.
	(get_icon_type): Use a helper function for the icons-from-stat
	types.
	(gtk_file_system_unix_render_icon): Use the cached file info.
	(gtk_file_folder_unix_get_info): Put the info in the cache.
	(gtk_file_system_unix_get_folder): Create the cache of file info
	structures.

	* gtk/gtkfilesystem.c (gtk_file_info_set_display_name): Handle the
	case where display_name is the same as the existing
	info->display_name.