re PR libstdc++/61347 (std::distance(list.first(),list.end()) in O(1))

re PR libstdc++/61347 (std::distance(list.first(),list.end()) in O(1))

2014-10-13  Marc Glisse  <marc.glisse@inria.fr>

	PR libstdc++/61347
	PR libstdc++/63345
	* include/bits/list.tcc (_List_base::_M_clear()): Delay cast so it
	isn't done for the sentinel.
	* include/bits/stl_list.h (_List_base::_M_size): Move...
	(_List_base::_List_impl::_M_node): ... here.
	(_List_base::_M_get_size(), _List_base::_M_set_size(size_t),
	_List_base::_M_inc_size(size_t), _List_base::_M_dec_size(size_t),
	_List_base::_M_node_count): Adapt to the move.
	* 23_containers/list/requirements/dr438/assign_neg.cc: Update
	line number.
	* 23_containers/list/requirements/dr438/constructor_1_neg.cc: Likewise.
	* 23_containers/list/requirements/dr438/constructor_2_neg.cc: Likewise.
	* 23_containers/list/requirements/dr438/insert_neg.cc: Likewise.

From-SVN: r216142