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
{
				height = Math.max( height, cell.getHeight( ) );
			}
			i = i + cell.getColSpan( ) - 1;
		}
		int dValue = height - originalRowHeight;
		for ( int i = startCol; i <= endCol; i++ )
		{
			CellArea cell = row.getCell( i );
			if ( cell == null )
			{
				
				continue;
			}
			if ( cell instanceof DummyCell )
			{
				int delta = ( (DummyCell) cell ).getDelta( );
				if ( cell.getRowSpan( ) == 1 )
				
				
				{
						CellArea refCell = ( (DummyCell) cell ).getCell( );
						refCell.setHeight( delta + height );
						verticalAlign( refCell );
				}
				else
				{
					CellArea refCell = ( (DummyCell) cell ).getCell( );
					refCell.setHeight( delta + height );
					verticalAlign( refCell );