Bug 129886 Delect a column contain the marge row which contain some item, Error message pop up
Details: Delect a column contain the marge row which contain some item, Error message pop up Setp: 1.New a library and add a 3*3 grid 2.Insert a label in cell(1,1) 3.Marge the cell of (1,1) and (1,2) 4.Delete column 1. Actual result: An error message pop up
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/core/model/schematic/ColumnHandleAdapter.java
*  Actuate Corporation  - initial API and implementation
 *******************************************************************************/
package org.eclipse.birt.report.designer.core.model.schematic;
import java.util.Iterator;
import org.eclipse.birt.report.designer.core.model.DesignElementHandleAdapter;
import org.eclipse.birt.report.designer.core.model.IModelAdapterHelper;
import org.eclipse.birt.report.designer.util.DEUtil;
import org.eclipse.birt.report.designer.util.MetricUtility;
import org.eclipse.birt.report.model.api.ColumnHandle;
import org.eclipse.birt.report.model.api.DesignElementHandle;
import org.eclipse.birt.report.model.api.DimensionHandle;
import org.eclipse.birt.report.model.api.GridHandle;
import org.eclipse.birt.report.model.api.PropertyHandle;
import org.eclipse.birt.report.model.api.SlotHandle;
import org.eclipse.birt.report.model.api.TableGroupHandle;
import org.eclipse.birt.report.model.api.activity.SemanticException;
import org.eclipse.birt.report.model.api.elements.DesignChoiceConstants;
import org.eclipse.birt.report.model.api.metadata.DimensionValue;
/**
 * Adapter class to adapt model handle. This adapter provides convenience
 * methods to GUI requirement ColumnHandleAdapter responds to model ColumnHandle
 */
public class ColumnHandleAdapter extends DesignElementHandleAdapter
{
	public static final int DEFAULT_MINWIDTH = 20;
	/**
	 * @param handle
	 */
	public ColumnHandleAdapter( ColumnHandle column )
	{