2004-07-20  Matthias Clasen  <mclasen@redhat.com>

	Allow custom initialization of cell editables.  (#147221)

	* gtk/gtkcellrenderer.h (struct _GtkCellRendererClass):
	* gtk/gtkcellrenderer.c (gtk_cell_renderer_class_init): Add a
	::editing-started signal as a hook for setting up the
	GtkCellEditable.
	(gtk_cell_renderer_start_editing): ...and emit it here.