Fixed Possible Nulls in Discover Asset reference

CHANGELOG.md

 # Changelog
 
+## 2019.3.6
+
+#### Fixed
+
+* Fixed Possible Nulls in Discover Asset reference
+
 ## 2019.3.5
 
 #### Added

Editor/Discover/DiscoverWindow.cs

             }
         }
 
+        [SerializeField]
         public DiscoverAsset discoverAsset { get; private set; }
         Texture2D header;
         bool forceGlobal;
             titleContent = new GUIContent(discoverAsset.WindowTitle);
             minSize = new Vector2(discoverAsset.WindowWidth, discoverAsset.WindowHeight);
             maxSize = new Vector2(discoverAsset.WindowWidth, discoverAsset.WindowHeight);
+            UpdateDiscoverObjects();
-            UpdateDiscoverObjects();
             EditorSceneManager.newSceneCreated += UpdateDiscoverObjectsOnCreate;
             EditorSceneManager.sceneOpened += UpdateDiscoverObjectsOnLoad;
             EditorSceneSetup.onSetupLoaded += UpdateDiscoverObjectsOnLoadSetup;