removing a bug

theano/tensor/elemwise.py

@@ -821,7 +821,7 @@ class Elemwise(Op):
         # Determine the shape of outputs
         out_shape = []
         for values in izip(*[input.shape for input in inputs]):
-            if numpy.prod(values) == 0:
+            if numpy.any(values == 0):
                 # All non-broadcasted dimensions should be zero
                 assert max(values) <= 1
                 out_shape.append(0)