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
RowHandle hanlde = (RowHandle) list.get( i );
			hanlde.addListener( this );
		}
	}
	protected void addColumnListener( )
	{
		List list = getColumns( );
		int size = list.size( );
		for ( int i = 0; i < size; i++ )
		{
			( (ColumnHandle) list.get( i ) ).addListener( this );
		}
	}
	protected void removeColumnListener( )
	{
		List list = getColumns( );
		int size = list.size( );
		for ( int i = 0; i < size; i++ )
		{
			( (ColumnHandle) list.get( i ) ).removeListener( this );
		}
	}
	protected void removeRowListener( )
	{
		List list = getRows( );
		int size = list.size( );
		for ( int i = 0; i < size; i++ )
		{
			( (RowHandle) list.get( i ) ).removeListener( this );
		}