Method test2

test/IECore/LookupTest.cpp:83–89

	}

	void test2()
	{
		Lookupff l( NanFunctor(), 0.0f, 1.0f, 50 );
		l.init( LinearFunctor(), 0.0f, 1.0f, 25 );

		BOOST_CHECK( fabs( 1.0f - l( 1.0f ) ) < 0.00001f );
	}

};