fix warning in tests

tests/main.cpp

@@ -7,7 +7,7 @@ BOOST_AUTO_TEST_CASE(test_test)
 	BOOST_CHECK(a == 0);
 }
 
-boost::unit_test::test_suite* init_unit_test_suite(int argc, char* argv[])
+boost::unit_test::test_suite* init_unit_test_suite(int /*argc*/, char* /*argv*/[])
 {
 	return 0;
 }