Bug 196105 There is an extra red square when preview the attached design file in ppt[1205]
Description: There is an extra red square when preview the attached design file in ppt. Build number: 2.2.1.v20070711-0630 Steps to reproduce: 1.Open attached report design 2.Preview in PPT Expected reuslt: The report is previewed correctly. Actual result: See the screenshot. Error log: N/A
engine/org.eclipse.birt.report.engine.emitter.ppt/src/org/eclipse/birt/report/engine/emitter/ppt/PPTWriter.java
private OutputStream pptOutput = null;
	protected int currentPageNum = 0;
	private int shapeCount = 0;
	protected float pageWidth, pageHeight;
	
	private Map imageNames = new HashMap( );
	private List imageTitles = new ArrayList( );
	
	private Map imageExtensions = new HashMap( );
	
	private Map fileNamesLists = new TreeMap( );
	private Map currentImageData = new HashMap( );;
	public PPTWriter( OutputStream output )
	{
		
		pptOutput = output;
	}
	/**
	 * Creates a PPT Document.
	 * 
	 */
	public void start( )
	{
		if ( !imageNames.isEmpty( ) )
		{
			imageNames.clear( );
		}
		if ( !fileNamesLists.isEmpty( ) )
		{