Description:
------------
xmlrpc_decode decode hashtable response with integer key will ignore the key, just decode the same result as Vector.

Reproduce code:
---------------
ws-apache encode the Hashtable<Integer, String> as xmlrpc_decode's parameter:
<?php
print_r(xmlrpc_decode('<?xml version="1.0" encoding="UTF-8"?><methodResponse xmlns:ex="http://ws.apache.org/xmlrpc/namespaces/extensions"><params><param><value><struct><member><name><value><i4>3</i4></value></name><value>wps2000</value></member><member><name><value><i4>0</i4></value></name><value>ddr</value></member></struct></value></param></params></methodResponse>'));

I format the xml response here:
<?xml version="1.0" encoding="UTF-8"?>
<methodResponse xmlns:ex="http://ws.apache.org/xmlrpc/namespaces/extensions">
	<params>
		<param>
			<value>
				<struct>
					<member>
						<name>
							<value>
								<i4>3</i4>
							</value>
						</name>
						<value>wps2000</value>
					</member>
					<member>
						<name>
							<value>
								<i4>0</i4>
							</value>
						</name>
						<value>ddr</value>
					</member>
				</struct>
			</value>
		</param>
	</params>
</methodResponse>

It seems the xmlrpc_decode just take Hashtable<Integer, Object> as Vector<Object>

Expected result:
----------------
array(
    3  => wps2000
    0  => ddr
)

Actual result:
--------------
Array
(
    [0] => wps2000
    [1] => ddr
)