Randomutility random vector2d error

[bi3mer]

Currently fails unit tests that aren't pushed up yet:

    [Test]
    public void RandomVector2dMaxMagnitudeTest()
    {
        const float maxMagnitude = 10;

        for (int i = 0; i < 100; ++i)
        {
            Vector2 res = RandomUtility.RandomVector2d(maxMagnitude);
            Assert.IsTrue(res.magnitude <= maxMagnitude);
        }
    }