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.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/schematic/editparts/TableEditPart.java
* @param group
	 */
	public void removeGroup( Object group )
	{
		try
		{
			( (TableHandleAdapter) getModelAdapter( ) ).removeGroup( group );
		}
		catch ( Exception e )
		{
			ExceptionHandler.handle( e );
		}
	}
	protected void addListenerToChildren( )
	{
		addGroupListener( );
		addRowListener( );
		addColumnListener( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.designer.core.model.ITableAdaptHelper#getClientAreaSize()
	 */
	public Dimension getClientAreaSize( )
	{
		return getFigure( ).getParent( ).getClientArea( ).getSize( );
	}
	/**
	 *