2004-02-25  Michael Natterer  <mitch@gimp.org>

	Changed libgimpthumb API in a way that will make GtkFileChooser
	integration possible without doing major hacks:

	* libgimpthumb/gimpthumb-enums.h: added GimpThumbFileType enum
	and extended GimpThumbState enum.

	* libgimpthumb/gimpthumb-utils.[ch]: return GimpThumbFileType
	instead of gboolean from gimp_thumb_file_test().

	* libgimpthumb/gimpthumbnail.c
	* app/core/gimpimagefile.c: changed accordingly (the icons
	used for REMOTE, FOLDER and SPECIAL need to be changed).