Bug 122045 Template should show blank preview when there is no image
Create a template but do not associate an image with it. Place the template in the templates directory. Now, create a new report design. On the second page of the New Report dialog, select the template that has no image. Actual result: The preview appears as a white rectangle with a small red square in the top left. Expected result: The preview appears as a gray background in the preview image area.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/wizards/WizardTemplateChoicePage.java
{
		Map files = new HashMap( );
		public Template( String name, String description, String reportPath,
				String picturePath, String cheatSheetId )
		{
			this.name = name;
			this.templateDescription = description;
			this.reportPath = reportPath;
			this.picturePath = picturePath;
			this.cheatSheetId = cheatSheetId;
		}
		public Template( String reportPath )
		{
			try
			{
				ReportDesignHandle reportDesign = (ReportDesignHandle) files
						.get( reportPath );
				if ( reportDesign == null )
				{
					reportDesign = SessionHandleAdapter.getInstance( )
							.getSessionHandle( ).openDesign( reportPath );
					files.put( reportPath, reportDesign );
				}
				
				name = reportDesign.getDisplayName( ) == null
						? UIUtil
								.getSimpleFileName( reportDesign.getFileName( ) )
						: reportDesign.getDisplayName( );
				templateDescription = reportDesign