Bug 135790 ClassCastException in RowData.
ClassCastException is thrown in RowData line 81(IBaseExpression expr = ( IBaseExpression ) valueExpressions.get( index - 1 );).
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/parser/EngineIRVisitor.java
page.setColumnSpacing( spacing );
		
		SlotHandle contentSlot = handle.getContent( );
		for ( int i = 0; i < contentSlot.getCount( ); i++ )
		{
			apply( contentSlot.get( i ) );
			if ( currentElement != null )
			{
				page.addContent( (ReportItemDesign) currentElement );
			}
		}
		currentElement = page;
	}
	public void visitSimpleMasterPage( SimpleMasterPageHandle handle )
	{
		SimpleMasterPageDesign page = new SimpleMasterPageDesign( );
		
		setupMasterPage( page, handle );
		page.setHeaderHeight( createDimension( handle.getHeaderHeight( ) ) );
		page.setFooterHeight( createDimension( handle.getFooterHeight( ) ) );
		page.setShowFooterOnLast( handle.showFooterOnLast( ) );
		page.setShowHeaderOnFirst( handle.showHeaderOnFirst( ) );
		page.setFloatingFooter( handle.isFloatingFooter( ) );
		SlotHandle headerSlot = handle.getPageHeader( );
		for ( int i = 0; i < headerSlot.getCount( ); i++ )
		{
			apply( headerSlot.get( i ) );
			if ( currentElement != null )
			{
				page.addHeader( (ReportItemDesign) currentElement );