2002-02-11  Jon K Hellan  <hellan@acm.org>

	Support per sheet grid color. Needed for correct XL import.

	* src/style-color.[ch] (color_equal): Rename to style_color_equal
	and export.

	* src/style-border.[ch] (style_border_none_set_color): New
	function. Update the grid color (color of style border none) to
	the given color.

	* src/sheet-style.[ch] (sheet_style_update_grid_color): New
	function. Update the grid color to fit the given sheet.

	* src/item-grid.c (item_grid_draw): Call
	sheet_style_update_grid_color before rendering.

	* src/print-cell.c (print_cell_range): Ditto

	* src/preview-grid.c (preview_grid_draw): Call
	style_border_none_update_color before rendering.