Prevent NPE

app/src/main/java/eu/faircode/email/FragmentPro.java

@@ -240,9 +240,11 @@ public class FragmentPro extends FragmentBase implements SharedPreferences.OnSha
                 post(new RunnableEx("pro:disconnected") {
                     @Override
                     public void delegate() {
+                        if (ivConnected != null) {
                             ivConnected.setImageResource(R.drawable.twotone_cloud_off_24);
                             ivConnected.setVisibility(View.VISIBLE);
                         }
+                    }
                 });
             }