2000-03-12  JP Rosevear  <jpr@arcavia.com>

	* src/dialogs/dialog-cell-sort.c : Remove old
	clip_range_to_finite function and replace with
	range_clip_to_finite.
	(dialog_cell_sort): Reflect new function call.

	* src/ranges.c (range_clip_to_finite): New function, if range
	is infinite, cut it down to to a finite range using
	sheet_get_extent.

	* src/ranges.h: New prototype "range_clip_to_finite".

	* src/workbook-format-toolbar.c : Add sort ascend/descend buttons.
	(sort_ascend_cmd): New toolbar callback function to sort
	selection in ascending order.
	(sort_descend_cmd): New toolbar callback function to sort
	selection in descending order.