message: Fix failing error
diff: @@ -169,7 +169,7 @@ fn failing_transformation() {
  let mut x = [1000000.0];
  let mut y = [1000000.0];
  - let mut z = [0.0, 0.0];
  + let mut z = [0.0];
  let trafo = CoordTransform::new(&wgs84, &webmercator).unwrap();
  let r = trafo.transform_coords(&mut x, &mut y, &mut z);
  