* valops.c (value_arg_coerce): Now takes param_type argument.

	* valops.c (value_arg_coerce):  Now takes param_type argument.
	(call_function_by_hand):  Convert arguments with value_arg_coerce
	early, and overwrite original args with converted args.
	No longer need multiple calls to value_arg_coerce.
	(value_arg_push):  Removed.
	* hppa-tdep.c (hppa_push_arguments):  No longer call value_arg_coerce.
	* mips-tdep.c (mips_push_arguments):  Likewise.
	* alpha-tdep.c (alpha_push_arguments):  Likewise.
	* rs6000-tdep.c (push_arguments, ran_out_of_registers_for_arguments):
	Likewise.
	* value.h (value_arg_coerce):  Remove declaration.  (It's now static.)

	* valops.c (value_cast):  Do COERCE_VARYING_ARRAY after COERCE_REF.