2004-10-11  Sven Neumann  <sven@gimp.org>

	* libgimpthumb/gimpthumb-utils.[ch]
	* libgimpthumb/gimpthumb.def: added an API to delete thumbnails.

	* app/widgets/gimpthumbbox.c (gimp_thumb_box_create_thumbnail):
	when recreating a thumbnail on user request, delete all existing
	thumbnails for it.

	* plug-ins/common/AlienMap2.c: removed unused variable.