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
assert name != null;
				assert value != null;
				Map properties = element.getCustomProperties( );
				assert properties != null;
				properties.put( name, value );
			}
		}
		setupNamedExpressions( handle, element.getNamedExpressions( ) );
		setupElementIDMap( element );
	}
	protected String createExpression( String expr )
	{
		if ( expr != null && !expr.trim( ).equals( "" ) )
		{
			return expr;
		}
		return null;
	}
	/**
	 * create a Action.
	 * 
	 * @param handle
	 *            action in DE
	 * @return action in Engine.
	 */
	protected ActionDesign createAction( ActionHandle handle )
	{
		ActionDesign action = new ActionDesign( );
		String linkType = handle.getLinkType( );
		if ( EngineIRConstants.ACTION_LINK_TYPE_HYPERLINK.equals( linkType ) )