Bug 179676 [regression]Error when report has chart in master page[05]
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/internal/executor/doc/ReportPageReader.java
{
		super.openReaders( );
		
		hintReader = new PageHintReaderV2( reportDoc );
		hintReader.open( );
		IDocArchiveReader archive = reportDoc.getArchive( );
		RAInputStream in = archive
				.getStream( ReportDocumentConstants.PAGE_STREAM );
		pageReader = new CachedReportContentReaderV3( reportContent, in );
	}
	protected void closeReaders( )
	{
		super.closeReaders( );
		if ( hintReader != null )
		{
			hintReader.close( );
			hintReader = null;
		}
		if ( pageReader != null )
		{
			pageReader.close( );
			pageReader = null;
		}
		outputPages.clear( );
	}
	protected IPageHint loadPageHint(long pageNumber)
	{
		try
		{
			IPageHint hint = hintReader.getPageHint( pageNumber );