bugfix save listener

src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/ui/components/AbstractDataGrid.java

@@ -56,9 +56,11 @@ public abstract class AbstractDataGrid<T> extends VerticalLayout {
 		Binder<T> binder = editor.getBinder();
 		editor.addSaveListener(ev -> {
 			hasChanges = true;
+			if (editedListener.editObject != null) {
 				for (Consumer<T> consumer : successConsumers) {
 					consumer.accept(ev.getBean());
 				}
+			}
 			dataProvider.refreshAll();
 		});
 		editor.addCancelListener(editedListener);