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
if ( data != null )
			{
				return data.getRowIndex( ) - 1;
			}
		}
		return 0;
	}
	private boolean canSpan( SheetData data, XlsContainer rowContainer )
	{
		SheetData realData = getRealData(data);
		if ( realData == null )
			return false;
		if ( isInContainer( realData, rowContainer ) )
		{
			return true;
		}
		return realData.getRowSpanInDesign( ) > 0;
	}
	private SheetData getRealData( SheetData data )
	{
		while ( data != null && data.isBlank( ) )
		{
			data = ( (BlankData) data ).getData( );
		}
		return data;
	}
	private boolean isInContainer( SheetData data, XlsContainer rowContainer )
	{
		return data.getRowIndex( ) > rowContainer.getStartRowId( );
	}