* include/bits/alloc_traits.h (allocator_traits::_S_allocate): Do
	not use varargs when argument could be non-POD.
	(__alloctr_rebind_helper): Eliminate static const bool member by
	using true_type and false_type.
	(allocator_traits::__allocate_helper): Likewise.
	(allocator_traits::__construct_helper): Likewise.
	(allocator_traits::__destroy_helper): Likewise.
	(allocator_traits::__maxsize_helper): Likewise.
	(allocator_traits::__select_helper): Likewise.
	* include/bits/ptr_traits.h (__ptrtr_rebind_helper): Likewise.
	* include/bits/stl_tree.h (_Rb_tree::operator=(const _Rb_tree&)):
	Remove redundant condition.
	* include/bits/stl_vector.h (vector::operator=(const vector&)):
	Likewise.
	(_Vector_impl::_M_allocate, _Vector_impl::_M_deallocate): Use
	indirection through __alloc_traits.
	* include/ext/alloc_traits.h (__allocator_always_compares_equal):
	Eliminate static const bool members by using true_type and false_type.
	(__gnu_cxx::__alloc_traits::__is_custom_pointer): Optimize.
	* testsuite/util/testsuite_allocator.h (PointerBase): Define.
	* testsuite/20_util/allocator_traits/members/allocate_hint_nonpod.cc:
	New.
	* testsuite/20_util/allocator_traits/requirements/typedefs2.cc: New.

From-SVN: r207240