invoke.cc: Avoid -Wall warnings.

2011-06-22  Paolo Carlini  <paolo.carlini@oracle.com>

	* testsuite/20_util/reference_wrapper/invoke.cc: Avoid -Wall warnings.
	* testsuite/20_util/reference_wrapper/typedefs-3.cc: Likewise.
	* testsuite/20_util/reference_wrapper/invoke-2.cc: Likewise.
	* testsuite/20_util/allocator_traits/members/allocate_hint.cc:
	Likewise.
	* testsuite/20_util/ratio/operations/ops_overflow_neg.cc: Likewise.
	* testsuite/20_util/bind/socket.cc: Likewise.
	* testsuite/20_util/pointer_traits/pointer_to.cc: Likewise.
	* testsuite/util/testsuite_random.h: Likewise.

From-SVN: r175318