re PR c++/63415 (internal compiler error: unexpected expression ‘static_cast<int>(std::is_same<T, A1>{})’ of kind static_cast_expr)

	PR c++/63415
	* pt.c (value_dependent_expression_p) [CONSTRUCTOR]: Check the type.
	(iterative_hash_template_arg): Likewise.

From-SVN: r216043