gtkcontainer.h declares gtk_container_propagate_expose(), but it's not implemented anywhere, leading to linker errors when trying to use it.

I could just remove the declaration, but it's mentioned in the gtk_widget_send_expose() documentation, so that should be updated, or maybe gtk_widget_send_expose() should also be removed (it's used in gtkmain.c):

/**
 * gtk_widget_send_expose:
 * @widget: a #GtkWidget
 * @event: a expose #GdkEvent
 * 
 * Very rarely-used function. This function is used to emit
 * an expose event signals on a widget. This function is not
 * normally used directly. The only time it is used is when
 * propagating an expose event to a child %NO_WINDOW widget, and
 * that is normally done using gtk_container_propagate_expose().
 *
 * If you want to force an area of a window to be redrawn, 
 * use gdk_window_invalidate_rect() or gdk_window_invalidate_region().
 * To cause the redraw to be done immediately, follow that call
 * with a call to gdk_window_process_updates().
 * 
 * Return value: return from the event signal emission (%TRUE if 
 *               the event was handled)
 **/
gint
gtk_widget_send_expose (GtkWidget *widget,
			GdkEvent  *event)