* eval.c (evaluate_subexp_standard): Report error when attempting to

	* eval.c (evaluate_subexp_standard):  Report error when attempting to
	evaluate subscripts for types which cannot be subscripted.

	* valarith.c (value_x_binop, value_x_unop):  Add noside parameter.
	Return a zero value with the return type of the member function
	if noside is EVAL_AVOID_SIDE_EFFECTS instead of calling the member
	function.
	* values.h (value_x_binop, value_x_unop):  Update prototypes
	accordingly.
	* eval.c (evaluate_subexp_standard):  Update all callers of
	value_x_binop, value_x_unop accordingly.

	* valarith.c (value_neg, value_complement):  Perform ANSI C/C++
	integral promotion on operands.