vector (vector<>::cbegin()): Use C++11 direct initialization.

vector (vector<>::cbegin()): Use C++11 direct initialization.

2018-10-15  François Dumont  <fdumont@gcc.gnu.org>

	* include/debug/vector (vector<>::cbegin()): Use C++11 direct
	initialization.
	(vector<>::cend()): Likewise.
	(vector<>::emplace(const_iterator, _Args&&...)): Likewise and use
	consistent iterator comparison.
	(vector<>::insert(const_iterator, size_type, const _Tp&)): Likewise.
	(vector<>::insert(const_iterator, _InputIterator, _InputIterator)):
	Likewise.
	(vector<>::erase(const_iterator)): Likewise.
	(vector<>::erase(const_iterator, const_iterator)): Likewise.

From-SVN: r265156