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
cellContent.setRowSpan( 1 );
			cellContent.setParent( row.getContent( ) );
		}
		int emptyCellColID = cellContent.getColumn( );
		int emptyCellColSpan = cellContent.getColSpan( );
		CellArea emptyCell = upperCell.cloneArea( );
		
		BoxStyle bs = emptyCell.getBoxStyle( );
		bs.setRightBorder( null );
		bs.setBottomBorder( null );
		
		emptyCell.setHeight( 0 );
		emptyCell.setRowSpan( rowSpan );
		
		CellArea originalCell = upperCell;
		if ( upperCell instanceof DummyCell )
		{
			originalCell = ( (DummyCell) upperCell ).getCell( );
		}
		if( ! isInRepeatHeader( ) )
		{
			originalCell.setUsedRowSpan( originalCell.getUsedRowSpan( ) + 1 );
		}
		
		CellArea leftSideCellArea = null;
		if ( emptyCellColID > startCol )
		{
			leftSideCellArea = row.getCell( emptyCellColID - 1 );
			if ( leftSideCellArea == null )
			{