Bug 315050 [Automation][Regression]Image size is different from golden file when preview as xls
engine/org.eclipse.birt.report.engine.emitter.prototype.excel/src/org/eclipse/birt/report/engine/emitter/excel/layout/ExcelLayoutEngine.java
cache.addData( currentColumnIndex, blank );
					}
				}
			}
			else if ( upstair != null && upstair.getRowSpanInDesign( ) > 0
					&& !isInContainer( upstair, rowContainer ) )
			{
				upstair.decreasRowSpanInDesign( );
			}
		}
	}
	private void calculateRowHeight( SheetData[] rowData, boolean isAuto )
	{
		float rowHeight = 0;
		int rowIndex = getRowIndex( rowData );
		float lastRowHeight = rowIndex > 0
				? cache.getRowHeight( rowIndex - 1 )
				: 0;
		boolean hasCurrentRowHeight = cache.hasRowHeight( rowIndex );
		if ( !hasCurrentRowHeight || isAuto )
		{
			for ( int i = 0; i < rowData.length; i++ )
			{
				SheetData data = rowData[i];
				if ( data != null )
				{
					if ( data.isBlank( ) )
					{