Fix more opt broadcast pattern change. This remove warning in jenkins

theano/tensor/opt.py

@@ -3069,14 +3069,10 @@ def local_subtensor_of_alloc(node):
     if type(rval) not in (list, tuple):
         rval = [rval]
     if rval[0].type != node.outputs[0].type:
-        # It happen that the make_node() isn't able to infer that some
-        # dimensions are broadcastable, but that now we can infer
-        # that. So we need to remove that information here.
-        rval[0] = theano.tensor.unbroadcast(
-            rval[0],
-            *[i for i, (b1, b2) in enumerate(zip(rval[0].broadcastable,
-                                                 node.outputs[0].broadcastable))
-              if b1 and not b2])
+        # It happen that the make_node() isn't able to infer the same pattern.
+        # We know it is safe, so fix that.
+        rval[0] = T.patternbroadcast(rval[0], node.outputs[0].broadcastable)
+
     return rval