fix the basic decision to return 1 instead of null

unity-environment/Assets/ML-Agents/Examples/Basic/Scripts/BasicDecision.cs

 using System.Collections.Generic;
 using UnityEngine;
 
-public class BasicDecision : MonoBehaviour, Decision {
+public class BasicDecision : MonoBehaviour, Decision
+{
+
+    public float[] Decide(List<float> state, List<Camera> observation, float reward, bool done, float[] memory)
+    {
+        return new float[1]{ 1f };
-	public float[] Decide (List<float> state, List<Camera> observation, float reward, bool done, float[] memory)
-	{
-		return default(float[]);
+    }
-	}
+    public float[] MakeMemory(List<float> state, List<Camera> observation, float reward, bool done, float[] memory)
+    {
+        return new float[0];
-	public float[] MakeMemory (List<float> state, List<Camera> observation, float reward, bool done, float[] memory)
-	{
-		return default(float[]);
-		
-	}
+    }
 }