* language.h (struct language_defn): New field evaluate_exp.

	* language.h (struct language_defn):  New field evaluate_exp.
	* c-lang.c (c_language_defn, cplus_language_defn, asm_langauge_defn),
	f-lang.c (f_language_defn), language.c (unknown_language_defn,
	auto_language_defn, local_language_defn), m2-lang.c (m2_language_defn):
	Set evaluate_exp to evaluate_subexp_standard.
	* ch-lang.c (evaluate_subexp_chill):  New function.  Chill-specific
	support for MULTI_SUBSCRIPT.
	(chill_language_defn):  Set evaluate_exp to evaluate_subexp_chill.
	* eval.c (enum noside):  Move from here ....
	* expression.h (enum noside):  ... to here.
	(evaluate_subexp_standard):  New prototype.
	* eval.c (evaluate_subexp):  Renamed to evaluate_subexp_standard.
	Removed lo-longer-needed test for chill_varying_type.
	(evaluate_subexp):  New.  Calls exp->language_defn->evaluate_exp.