vector.tcc (vector<>operator=(const vector<>&): Reset pointers after deallocation when memory can be reused.

2013-03-08  François Dumont  <fdumont@gcc.gnu.org>

	* include/bits/vector.tcc (vector<>operator=(const vector<>&):
	Reset pointers after deallocation when memory can be reused.
	* testsuite/23_containers/vector/allocator/minimal.cc: Insert
	elements to really challenge C++11 allocator integration.
	* testsuite/23_containers/vector/allocator/copy.cc: Likewise.
	* testsuite/23_containers/vector/allocator/copy_assign.cc:
	Likewise.
	* testsuite/23_containers/vector/allocator/move_assign.cc:
	Likewise.
	* testsuite/23_containers/vector/allocator/swap.cc: Likewise and
	swap vector back before checks on memory/personality mapping are
	performed.
	* testsuite/23_containers/forward_list/allocator/minimal.cc:
	Insert element to really challenge C++11 allocator integration.
	* testsuite/23_containers/forward_list/allocator/copy.cc:
	Likewise.
	* testsuite/23_containers/forward_list/allocator/copy_assign.cc:
	Likewise.
	* testsuite/23_containers/forward_list/allocator/move_assign.cc:
	Likewise.
	* testsuite/23_containers/forward_list/allocator/swap.cc: Likewise
	and swap forward_list back before checks on memory/personality
	mapping are performed.

From-SVN: r196557