Fixed - App is crashing in chat screen.

app/src/main/java/com/vsoft/servicenow/ui/ChatActivity.java

@@ -279,9 +279,11 @@ public class ChatActivity extends AppCompatActivity implements OnDSListener, OnD
             if(droidSpeech != null) {
             if(droidSpeech != null) {
                 droidSpeech.closeDroidSpeechOperations();
                 droidSpeech.closeDroidSpeechOperations();
             }
             }
+            if(speaker != null) {
                 speaker.allow(true);
                 speaker.allow(true);
                 speaker.speak(message, mNewMessageUtteranceId);
                 speaker.speak(message, mNewMessageUtteranceId);
             }
             }
+        }
 
 
         mMessages.add(chatBotHistory);
         mMessages.add(chatBotHistory);
         mAdapter.notifyItemInserted(mMessages.size() - 1);
         mAdapter.notifyItemInserted(mMessages.size() - 1);