2012-04-23  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/53080
	* include/std/array (tuple_element, get): static_assert I < N.
	* testsuite/23_containers/array/tuple_interface/tuple_element_neg.cc:
	New.
	* testsuite/23_containers/array/tuple_interface/get_neg.cc: Likewise.
	* testsuite/23_containers/array/tuple_interface/tuple_element.cc: Fix.

From-SVN: r186702