TST: Fix uninitialized value in masked ndenumerate test

The test used unintialized values, if NaN happened to be there
the test would fail (and generally, uninitialized values being used
in tests is bad, since it shows up in valgrind).

Author: seberg

numpy/ma/tests/test_extras.py

@@ -1674,7 +1674,7 @@ def test_shape_scalar(self):
 class TestNDEnumerate:
 
     def test_ndenumerate_nomasked(self):
-        ordinary = np.ndarray(6).reshape((1, 3, 2))
+        ordinary = np.arange(6.).reshape((1, 3, 2))
         empty_mask = np.zeros_like(ordinary, dtype=bool)
         with_mask = masked_array(ordinary, mask=empty_mask)
         assert_equal(list(np.ndenumerate(ordinary)),