BUG: Fixed python vtkTuple templated class test.

The vtkTuple derived classes do not initialize members unless a
constructor with an initialization argument is called. Corrected the
tests to call such a constructor.

Change-Id: I723db01184859969cbf1f7b0da62248b4633ec12

Common/Testing/Python/TestTemplates.py

@@ -109,11 +109,11 @@ class TestTemplates(Testing.vtkTest):
         # make sure Rect inherits operators
         r = vtk.vtkRectf(0, 0, 2, 2)
         self.assertEqual(r[2], 2.0)
-        c = vtk.vtkColor4ub()
+        c = vtk.vtkColor4ub(0, 0, 0)
         self.assertEqual(list(c), [0, 0, 0, 255])
         e = vtk.vtkVector['float32', 3]([0.0, 1.0, 2.0])
         self.assertEqual(list(e), [0.0, 1.0, 2.0])
-        i = vtk.vtkVector3['i']()
+        i = vtk.vtkVector3['i'](0)
         self.assertEqual(list(i), [0, 0, 0])
 
 if __name__ == "__main__":