zero rewards if ground contact

Project/Assets/ML-Agents/Examples/SharedAssets/Scripts/GroundContact.cs

                 touchingGround = true;
                 if (penalizeGroundContact)
                 {
-                    agent.SetReward(groundContactPenalty);
+//                    agent.SetReward(groundContactPenalty);
+                    agent.SetReward(0);
                 }
 
                 if (agentDoneOnGroundContact)
+            }
+        }
+
+        void FixedUpdate()
+        {
+            if (touchingGround)
+            {
+                agent.SetReward(0);
             }
         }