Bug 183585 [Automation][Regression] embedded image referenced in text item did not work properly in pdf
steps to reproduce: - use the attached report design - preview in pdf expected behavior: - embedded image shows actual behavior: - it showed nothing
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/util/HTML2Content.java
* Visits the children nodes of the specific node
	 * 
	 * @param visitor
	 *            the ITextNodeVisitor instance
	 * @param ele
	 *            the specific node
	 * @param needEscape
	 *            the flag indicating the content needs escaping
	 */
	private void processNodes( Element ele, boolean needEscape, HashMap cssStyles, IContent content )
	{
		int level=0;
		for ( Node node = ele.getFirstChild( ); node != null; node = node
				.getNextSibling( ) )
		{
			if ( node.getNodeName( ).equals( "value-of" ) ) 
			{
				if ( node.getFirstChild( ) instanceof Element )
				{
					processNodes( (Element) node.getFirstChild( ), checkEscapeSpace( node ), cssStyles, content );
				}
			}
			else if ( node.getNodeName( ).equals( "image" ) ) 
			{
				if ( node.getFirstChild( ) instanceof Element )
				{
					processNodes( (Element) node.getFirstChild( ), needEscape, cssStyles, content);
				}
			}
			else if(node.getNodeType() == Node.TEXT_NODE)