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
*/
	public Object getRow( int number )
	{
		return getTableAdapter( ).getRow( number );
	}
	/**
	 * @param number
	 *            a column position
	 * @return a specific column.
	 */
	public Object getColumn( int number )
	{
		return getTableAdapter( ).getColumn( number );
	}
	/**
	 * Gets all columns list
	 * 
	 * @return all columns list.
	 */
	public List getColumns( )
	{
		return getTableAdapter( ).getColumns( );
	}
	/**
	 * Gets the rows count
	 * 
	 * @return row count
	 */
	public int getRowCount( )
	{