Bug 123036 Data in a reprot is doubly stored
We currently stored data twice. Once in the content stream, once by DtE. The instance stored by content stream should not be there.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/document/RDSave.java
if ( dos == null )
		{
			outputStream = context.getOutputStream( queryResultID,
					subQueryID,
					DataEngineContext.EXPR_VALUE_STREAM );
			bos = new BufferedOutputStream( outputStream );
			dos = new DataOutputStream( bos );
			try
			{
				IOUtil.writeInt( dos, rowCount );
			}
			catch ( IOException e )
			{
				throw new DataException( ResourceConstants.RD_SAVE_ERROR, e );
			}
		}
	}
	
	/**
	 * @param currIndex
	 * @param exprID
	 * @param exprValue
	 */
	public void saveExprValue( int currIndex, String exprID, Object exprValue )
			throws DataException
	{
		initSave( );
		if ( currIndex != lastRowIndex )
		{
			try