2000-05-06  Jody Goldberg <jgoldberg@home.com>

	* src/cell.c (cell_set_expr_unsafe) : Split from cell_set_expr.

	* src/eval.c (invalidate_refs) : Use cell_set_expr_unsafe.

	* src/sheet.c (sheet_set_zoom_factor) : Depending on the order of
	  initialization we may also need to render some unrendered values.