2001-12-31  Jody Goldberg <jody@gnome.org>

	* src/sheet-object-widget.c (sheet_widget_checkbox_read_xml) : do not
	  set the sheet here.  That happens latter.  Handle no input smoothly.
	(sheet_widget_checkbox_write_xml) : handle no input smoothly.

	* src/format.c (append_second_elapsed) : use unsigned long.
	(append_minute_elapsed) : use unsigned long.
	(append_hour_elapsed) : use unsigned long.