ixdyn: Add test for new Array::default()

Author: bluss

tests/array.rs

@@ -1072,6 +1072,14 @@ fn test_default() {
     assert_eq!(b, arr0(Foo::default()));
 }
 
+#[test]
+fn test_default_ixdyn() {
+    let a = <Array<f32, IxDyn> as Default>::default();
+    let b = <Array<f32, _>>::zeros(IxDyn(&[0]));
+    assert_eq!(a, b);
+}
+
+
 #[test]
 fn test_map_axis() {
     let a = arr2(&[[1, 2, 3],