Bug 315035 [Automation][Regression]Error happened while merge cells in grid when preview as pdf/ppt/ps
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/nLayout/area/impl/TableLayout.java
if ( tableStyle != null && rowStyle != null && columnStyle != null
				&& cellContentStyle != null )
		{
			return 0;
		}
		BorderInfo border = bcr.resolveTableBottomBorder( tableStyle, rowStyle,
				columnStyle, cellContentStyle );
		if ( border != null )
		{
			cell.getBoxStyle( ).setBottomBorder( border );
			return border.getWidth( );
		}
		return 0;
	}
	protected void add( ContainerArea area, ArrayList rows )
	{
		if ( area instanceof RowArea )
		{
			rows.add( area );
		}
		else
		{
			Iterator iter = area.getChildren( );
			while ( iter.hasNext( ) )
			{
				ContainerArea container = (ContainerArea) iter.next( );
				add( container, rows );
			}
		}
	}