2004-01-18  Michael Natterer  <mitch@gimp.org>

	* app/core/gimpimage.c (gimp_image_add_layer,remove_layer): in the
	spirit of the fix for bug #131721 below, don't try to figure
	manually if "alpha_changed" needs to be emitted but simply compare
	the old and new values of gimp_image_has_alpha().

	* app/gui/preferences-dialog.c (prefs_dialog_new): follow
	"foo-window-type" -> "foo-window-hint" change.