re PR libstdc++/43183 (std::unique_ptr::reset() does not conform to N3035.)

re PR libstdc++/43183 (std::unique_ptr::reset() does not conform to N3035.)

2010-03-02  Jonathan Wakely  <jwakely.gcc@gmail.com>

	PR libstdc++/43183
	* include/bits/unique_ptr.h (reset): Fix as per working paper.
	(operator*, operator->, operator[], operator bool, release): Use
	pointer's null value instead of 0.
	* testsuite/20_util/unique_ptr/assign/assign_neg.cc: Adjust.
	* testsuite/20_util/unique_ptr/modifiers/reset_neg.cc: Adjust.
	* testsuite/20_util/unique_ptr/modifiers/43183.cc: New.

From-SVN: r157158