Bug 137444 Can not preview the old file with PDF
Details: Can not preview the old file with PDF Please run the attached file with PDF, it can not preview. But HTML and web view is no problem.
engine/org.eclipse.birt.report.engine.emitter.pdf/src/org/eclipse/birt/report/engine/emitter/pdf/PDFEmitter.java
String format = hlAction.getFormat();
						if ( "pdf".equalsIgnoreCase( format ) ) 
			            {
			    			link.append( baseURL.replaceFirst( "frameset", "run" ) ); 
			            }
						else if ( "html".equalsIgnoreCase( format ) ) 
			            {
			    			link.append( baseURL ); 
			            }
							
						link.append( "?__report=" );	
						try
						{
							link.append( URLEncoder.encode( reportName, "UTF-8" ) ); 	
						}
						catch ( UnsupportedEncodingException e1 )
						{
							
						}
						if(format !=null && format.length()>0)
						{
							link.append( "&__format=" + format );
						}
						
						if ( hlAction.getParameterBindings( ) != null )
						{
							Iterator paramsIte = hlAction.getParameterBindings( ).entrySet( ).iterator( );
							while ( paramsIte.hasNext( ) )
							{
								Map.Entry entry = (Map.Entry) paramsIte.next( );