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/executor/GridItemExecutor.java
import org.eclipse.birt.report.engine.content.IRowContent;
import org.eclipse.birt.report.engine.content.ITableBandContent;
import org.eclipse.birt.report.engine.content.ITableContent;
import org.eclipse.birt.report.engine.content.impl.TableContent;
import org.eclipse.birt.report.engine.content.impl.RowContent;
import org.eclipse.birt.report.engine.content.impl.CellContent;
import org.eclipse.birt.report.engine.content.impl.Column;
import org.eclipse.birt.report.engine.data.dte.DteResultSet;
import org.eclipse.birt.report.engine.emitter.IContentEmitter;
import org.eclipse.birt.report.engine.ir.CellDesign;
import org.eclipse.birt.report.engine.ir.ColumnDesign;
import org.eclipse.birt.report.engine.ir.GridItemDesign;
import org.eclipse.birt.report.engine.ir.IReportItemVisitor;
import org.eclipse.birt.report.engine.ir.ReportItemDesign;
import org.eclipse.birt.report.engine.ir.RowDesign;
import org.eclipse.birt.report.engine.script.internal.CellScriptExecutor;
import org.eclipse.birt.report.engine.script.internal.GridScriptExecutor;
import org.eclipse.birt.report.engine.script.internal.RowData;
import org.eclipse.birt.report.engine.script.internal.RowScriptExecutor;
/**
 * the gridItem excutor
 * 
 * @version $Revision: 1.28 $ $Date: 2006/01/17 20:10:42 $
 */
public class GridItemExecutor extends QueryItemExecutor
{
	/**
	 * constructor
	 * 
	 * @param context