init.c (perform_member_init): Use build_vec_init_expr for value-init of arrays, too.

init.c (perform_member_init): Use build_vec_init_expr for value-init of arrays, too.

	* init.c (perform_member_init): Use build_vec_init_expr for
	value-init of arrays, too.
	* cp-gimplify.c (cp_gimplify_expr): Use VEC_INIT_EXPR_VALUE_INIT.
	* cp-tree.h (VEC_INIT_EXPR_IS_CONSTEXPR): New macro.
	(VEC_INIT_EXPR_VALUE_INIT): New macro.
	* semantics.c (potential_constant_expression): No longer static.
	Check VEC_INIT_EXPR_IS_CONSTEXPR.
	* tree.c (build_vec_init_expr): Handle value-init.  Set
	VEC_INIT_EXPR_IS_CONSTEXPR and VEC_INIT_EXPR_VALUE_INIT.

From-SVN: r166413