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
{
			return false;
		}
		if ( handle instanceof LabelHandle )
		{
			return false;
		}
		if ( handle instanceof TextDataHandle )
		{
			return false;
		}
		if ( handle instanceof ExtendedItemHandle )
		{
			return false;
		}
		if ( handle instanceof ImageHandle )
		{
			return false;
		}
		return true;
	}
	/**
	 * Sets up cell element's style attribute.
	 * 
	 * @param cell
	 *            engine's styled cell element.
	 * @param handle
	 *            DE's styled cell element.
	 */
	protected void setupStyledElement( StyledElementDesign design,