Bug 166346 [Viewers] ViewerRow#getCell(Point) not working for Viewers without columns
If the viewer has no rows this should return not null but the ViewerCell at index 0
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/ViewerRow.java
/*******************************************************************************
 * Copyright (c) 2006 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Tom Shindl <tom.schindl@bestsolution.at> - initial API and implementation
 ******************************************************************************/
package org.eclipse.jface.viewers;
import org.eclipse.jface.util.Policy;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;