BUG #5285: contrib\xml2 package's xpath_table function

The following bug has been logged online:

Bug reference: 5285
Logged by: heyong
Email address: hewy126(at)126(dot)com
PostgreSQL version: postgresql-8.3
Operating system: solarias
Description: contrib\xml2 package's xpath_table function
Details:

<FEATURELIST>
<FEATURE id="1" name="发货期限" type="enum" value="10" fid="874"
unit="天内发货" isneeded="N" fieldflag="sendlimit" />
<FEATURE id="2" name="类别" type="enum" value="洗衣房设备"
fid="1835" isneeded="Y" />
<FEATURE id="3" name="供应商类型" type="enum" value="代理商"
fid="4441" isneeded="Y" fieldflag="providertype" />
</FEATURELIST>

when I run sql:
SELECT * FROM
xpath_table('id'
,'member_define_properties'
,'aquery.hy_test1'
,'/FEATURELIST/FEATURE/@fid
|/FEATURELIST/FEATURE/@name
|/FEATURELIST/FEATURE/@value
|/FEATURELIST/FEATURE/@fieldflag
'
,'1=1 and id=155015037'
)
AS t( offer_id NUMERIC
,fid text
,name text
,VALUE text
,fieldflag text
)

the result is

offer_id | fid | name | value | fieldflag
-----------+------+------------+------------+--------------
155015037 | 874 | 发货期限 | 10 | sendlimit
155015037 | 1835 | 类别 | 洗衣房设备 | providertype
155015037 | 4441 | 供应商类型 | 代理商 |

which fieldflag's values is err