Adjust to changed demo ctor

Author: stefanhaustein

src/main/java/com/pi4j/examples/hat/waveshare/waveshare13890/Demo.java

@@ -19,6 +19,7 @@ static void main(String[] args) {
             null,
             hat.getController(),
             null,
+            null,
             null).run();
 
         hat.getDisplay().close();