added verbose flag to inplace_optimizer

theano/tensor/opt.py

@@ -151,7 +151,9 @@ def insert_inplace_optimizer(env):
                                 and not env.destroyers(node.inputs[i])\
                                 and node.inputs[i] not in protected_inputs]
 
-        raised_warning = False
+        verbose = False
+
+        raised_warning = not verbose
 
         for candidate_output in candidate_outputs:
             for candidate_input in candidate_inputs: