Fix another case of equal_computations() with NoneConst and add a test.

theano/scan_module/scan_utils.py

@@ -424,9 +424,7 @@ def equal_computations(xs, ys, in_xs=None, in_ys=None):
                 return False
             elif (isinstance(dx, tensor.Constant) and
                   isinstance(dy, tensor.Constant)):
-                if not (numpy.all(dx.data == dy.data) and
-                        dx.type.dtype == dy.type.dtype and
-                        dx.data.shape == dy.data.shape):
+                if not dx.equals(dy):
                     return False
                 else:
                     pass

theano/scan_module/tests/test_scan_utils.py

+import theano
+from theano.scan_module.scan_utils import equal_computations
+from theano.tensor.type_other import NoneConst
+
+
+def test_equal_compuations():
+    # This was a bug report by a Theano user.
+    c = NoneConst
+    assert equal_computations([c], [c])