fix conversion to array (#1070)

python/tests/test_array.py

@@ -1710,6 +1710,13 @@ class TestArray(mlx_tests.MLXTestCase):
         peak_2 = mx.metal.get_peak_memory()
         self.assertEqual(peak_1, peak_2)
 
+    def test_add_numpy(self):
+        x = mx.array(1)
+        y = np.array(2, dtype=np.int32)
+        z = x + y
+        self.assertEqual(z.dtype, mx.int32)
+        self.assertEqual(z.item(), 3)
+
 
 if __name__ == "__main__":
     unittest.main()