Description:
------------
Somehow calling xmlrpc_encode_request() will change an object into an array even if the object is passed by reference to the function.  xmlrpc_encode_request() creates the correct XML in this case (a struct) but corrupts the original object. 

Reproduce code:
---------------
<?php

class One { var $x = 10; }
function go($name, $args) {
        $x = xmlrpc_encode_request($name,$args);
}

$o = new One();
print "Start with an object...\n";
var_dump($o);

print "Do some stuff...\n";
go('test',array($o));

print "Now we have an array ?!\n";
var_dump($o);


Expected result:
----------------
Start with an object...
object(One)#1 (1) {
  ["x"]=>
  int(10)
}
Do some stuff...
Now we have an array ?!
object(One)#1 (1) {
  ["x"]=>
  int(10)
}

Actual result:
--------------
Start with an object...
object(One)#1 (1) {
  ["x"]=>
  int(10)
}
Do some stuff...
Now we have an array ?!
array(1) {
  ["x"]=>
  int(10)
}