bug fix

ml-agents/mlagents/trainers/policy/transfer_policy.py

             )
 
         if var_predict:
-            predict_distribution = GaussianEncoderDistribution(
+            self.predict_distribution = GaussianEncoderDistribution(
-            self.predict = predict_distribution.sample()
+            self.predict = self.predict_distribution.sample()
         else:
             self.predict = tf.layers.dense(
                 hidden,