Bug 182676 [Automation][Regression] an extra image/chart was rendered
steps to reproduce: - use the attached report - preview expected behavior: - only one image/chart should be displayed actual behavior: - there were two on each report
engine/org.eclipse.birt.report.engine.emitter.html/src/org/eclipse/birt/report/engine/emitter/html/HTMLEmitter.java
* Build size style string say, "width: 10.0mm;".
	 * 
	 * @param content
	 *            The <code>StringBuffer</code> to which the result is output.
	 * @param name
	 *            The property name
	 * @param value
	 *            The values of the property
	 */
	public void buildSize( StringBuffer content, String name,
			DimensionType value )
	{
		if ( value != null )
		{
			content.append( ' ' );
			content.append( name );
			content.append( ": " );
			content.append( value.toString( ) );
			content.append( ';' );
		}
	}
	/**
	 * adds the default table styles
	 * 
	 * @param styleBuffer
	 */
	protected void addDefaultTableStyles( StringBuffer styleBuffer )
	{
		styleBuffer.append( "border-collapse: collapse; empty-cells: show;" ); 
	}