2000-08-16  Jody Goldberg <jgoldberg@home.com>

	* src/sheet.c (sheet_get_extent) : re-enable the use of
	  sheet_style_get_extent.

	* src/sheet-style.c (sheet_style_get_extent) : rework to use
	  'visible in blank cell' rather than non-infinite.

	* src/mstyle.c (mstyle_visible_in_blank) : new function.
	* src/border.c (style_border_visible_in_blank) : new function.

	* src/xml-io.c (xml_write_style) : Save font info even if it only
	  specifies underline or strikethrough.