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
{
				altText = messageFlashObjectNotSupported; 
			}
			entry.setProperty( StyleConstant.DATA_TYPE_PROP, SheetData.STRING );
			return createData( altText, entry );
		}
		if ( imageData != null )
		{
			return createData( image, imageData, imageWidth, imageHeight,
					entry, container, type );
		}
		else
		{
			entry.setProperty( StyleConstant.DATA_TYPE_PROP, SheetData.STRING );
			return createData( image.getAltText( ), entry );
		}
	}
	protected SheetData createData( IImageContent image, byte[] data,
			int imageWidth, int imageHeight, StyleEntry entry,
			XlsContainer container, int type )
	{
		int styleId = engine.getStyleId( entry );
		SheetData imageData = new ImageData( image, data, imageWidth,
				imageHeight, styleId, type, container );
		return imageData;
	}
	public Data addDateTime( Object txt, IStyle style, HyperlinkDef link,
			BookmarkDef bookmark, String dateTimeLocale, float height )
	{
		XlsContainer currentContainer = getCurrentContainer( );