Merge pull request #136 from microsoft/v-kydela/updateActivity

Fix assertion in TurnContextImpl.updateActivity

Author: tracyboehrer

libraries/bot-builder/src/main/java/com/microsoft/bot/builder/TurnContextImpl.java

@@ -361,7 +361,7 @@ private CompletableFuture<ResourceResponse[]> sendActivitiesThroughCallbackPipel
      */
     @Override
     public CompletableFuture<ResourceResponse> updateActivity(Activity withActivity) {
-        BotAssert.activityNotNull(activity);
+        BotAssert.activityNotNull(withActivity);
 
         ConversationReference conversationReference = activity.getConversationReference();
         withActivity.applyConversationReference(conversationReference);