safe_local_iterator.h (_Safe_local_iterator<>): Remove _M_bucket, use same information in normal local_iterator.

2013-11-22  François Dumont  <fdumont@gcc.gnu.org>

	* include/debug/safe_local_iterator.h (_Safe_local_iterator<>):
	Remove _M_bucket, use same information in normal local_iterator.
	(operator==): Remove redundant _M_can_compare check.
	* include/debug/safe_local_iterator.tcc: Adapt.
	* include/debug/unordered_set: Likewise.
	* include/debug/unordered_map: Likewise.

From-SVN: r205289