2004-03-03  Michael Natterer  <mitch@gimp.org>

	* libgimpthumb/gimpthumb-utils.[ch] (gimp_thumb_file_test):
	return the "errno" of a failed stat() call.

	* libgimpthumb/gimpthumbnail.[ch]: added member
	"image_not_found_errno" which contains the errno as returned by
	gimp_thumb_file_test() if thumbnail->image_state is
	GIMP_THUMB_STATE_NOT_FOUND.

	* app/core/gimpimagefile.c (gimp_imagefile_get_desc_string): display
	the real error as specified by thumbnail->image_not_found_errno
	instead of just "Could not open".