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
{
		return (Template) templates.get( selectedIndex );
	}
	/**
	 * @return Returns the blank report template.
	 */
	public Template getBlankTemplate( )
	{
		return (Template) templates.get( 0 );
	}
	/**
	 * @return true if show CheatSheets is checked.
	 */
	public boolean getShowCheatSheet( )
	{
		return chkBox.getSelection( );
	}
	public void dispose( )
	{
		super.dispose( );
		for ( Iterator it = templates.iterator( ); it.hasNext( ); )
		{
			Object item = it.next( );
			if ( item instanceof Template )
			{
				( (Template) item ).dispose( );
			}
		}
	}
}