2001-03-04  Michael Natterer  <mitch@gimp.org>

	* app/gimpbrushpreview.c
	* app/gimpgradientpreview.c
	* app/gimppalettepreview.c
	* app/gimppatternpreview.c
	* app/gimptoolinfopreview.c: removed all dnd code ...

	* app/gimppreview.c: ... and put it where is belongs.

	* app/gimpcontext.c: use g_type_is_a() instead of comparing the
	types directly.

	* app/gimpdnd.[ch]: same g_type_is_a() fix here. New function
	gimp_dnd_viewable_source_unset().

	* app/gimpdrawablelistitem.c: gtk_signal_connect_while_alive() to
	GimpDrawable's "visibility_changed" fixes a crash here.

	* app/gimplayerlistitem.c: check more strictly if DND reordering
	of layers is allowed.

	* app/gimplistitem.c: more DND reordering checking.
	Start drawing the drop indicator at x = name_label->allocation.x
	(looks better IMHO).