Fix some updates.
Be more paranoid when printing.
Big speedup for implicit intersection.

2000-04-05  Jody Goldberg <jgoldberg@home.com>

	* src/functions/fn-logical.c (gnumeric_if) : Use eval_expr_nonempty
	  and permit non-scalars.
	* src/functions/fn-lookup.c (gnumeric_choose) : Ditto.
	* src/functions/fn-math.c (gnumeric_sumproduct) : Ditto.

	* src/functions/fn-information.c (get_value_class) : Use
	  eval_expr_empty, and permit non-scalars.

	* src/func.c (function_iterate_argument_values) : Permit non-scalar
	  values.
	(function_marshal_arg) : Be more specific about what types of argument
	  must be scalar.

2000-04-04  Jody Goldberg <jgoldberg@home.com>

	* src/functions/fn-math.c (gnumeric_sumproduct) : eval_expr_nonempty
	  and permit non-scalars.
	* src/functions/fn-lookup.c (gnumeric_choose) : Ditto.

	* src/expr-name.c (eval_expr_name) : Accept 'as_scalar' as an
	  argument use eval_expr_empty.

	* src/expr.c (eval_expr_real) : Push the common cases for implicit
	  intersection further down for a big speed improvement.
	(eval_expr_nonempty) : New routine.
	(eval_expr_empty) : Accept as_scalar.

2000-04-04  Jody Goldberg <jgoldberg@home.com>

	* src/item-grid.c (item_grid_button_1) : sheet_update after button
	  press that changes selection.

2000-04-04  Jody Goldberg <jgoldberg@home.com>

	* src/print.c (print_hf) : Add precautions in an attempt to address
	  http://bugs.gnome.org/db/82/8200.html
	  I can not replicate it, but it can't hurt to be more careful just in
	  case.