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
IReportItemExecutor pageExecutor = new PageReader( this, 1,
						fragment );
				nextPage = -1;
				return pageExecutor;
			}
			else
			{
				IReportItemExecutor pageExecutor = new PageReader( this,
						nextPage, loadPageFragment( nextPage ) );
				nextPage = getNextPageNumber( );
				return pageExecutor;
			}
		}
		return null;
	}
	private long getNextPageNumber( )
	{
		
		if ( paginationType == IReportContentLoader.SINGLE_PAGE )
		{
			return -1;
		}
		if ( curPageRange == -1 )
		{
			if (outputPages.size( ) > 0)
			{
				curPageRange = 0;
				long[] pageRange = (long[]) outputPages.get( curPageRange );
				return pageRange[0];
			}