Merge pull request #459 from github-for-unity/fixes/settings-view-repository-null

SettingsView needs to check for null Repository

Author: StanleyGoldman

src/UnityExtension/Assets/Editor/GitHub.Unity/UI/SettingsView.cs

@@ -51,8 +51,12 @@ public override void OnEnable()
             userSettingsView.OnEnable();
             AttachHandlers(Repository);
 
-            Repository.CheckCurrentRemoteChangedEvent(lastCurrentRemoteChangedEvent);
-            Repository.CheckLocksChangedEvent(lastLocksChangedEvent);
+            if (Repository != null)
+            {
+                Repository.CheckCurrentRemoteChangedEvent(lastCurrentRemoteChangedEvent);
+                Repository.CheckLocksChangedEvent(lastLocksChangedEvent);
+            }
+
             metricsHasChanged = true;
         }