Bug 141950 Selection of select value in data set filter is error
Details: Selection of select value in data set filter is error Step: 1.New a report design. 2.Create a sample datasource and dataset. 3.Switch to filter. 4.Select a value in expression. 5.Drop the list of the value1 and select <select value...> Actual result: No value is appear and pop up an error. It said that "An expression has not been set"
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/data/ui/util/DataSetProvider.java
* @param resultSetColumnHandle
	 * @param column
	 */
	private void addResultSetColumn( PropertyHandle resultSetColumnHandle,
			DataSetViewData column )
	{
		ResultSetColumn rsColumn = new ResultSetColumn( );
		rsColumn.setColumnName( column.getDataSetColumnName( ) );
		rsColumn.setPosition( new Integer( column.getPosition( ) ) );
		try
		{
			resultSetColumnHandle.addItem( rsColumn );
		}
		catch ( SemanticException e )
		{
			ExceptionHandler.handle( e );
		}
	}
	
	/**
	 * @param dataSetType
	 * @param dataSourceType
	 * @return
	 */
	public static IConfigurationElement findDataSetElement( String dataSetType,
			String dataSourceType )
	{
		
		IConfigurationElement dataSourceElem = findDataSourceElement( dataSourceType );
		if ( dataSourceElem != null )