Description:
------------
When i'm trying to run a XML-RPC server  (using the xml-rpc-extension) with PHP5 i get a segfault.

Reproduce code:
---------------
<?php
$request = xmlrpc_encode_request("system.listMethods", array());
$server = xmlrpc_server_create();
echo xmlrpc_server_call_method($server, $request, false);
?>

Expected result:
----------------
<?xml version="1.0" encoding="iso-8859-1"?>
<methodResponse>
<params>
 <param>
  <value>
   <array>
    <data>
     <value>
      <string>system.listMethods</string>
     </value>
     <value>
      <string>system.methodHelp</string>
     </value>
     <value>
      <string>system.methodSignature</string>
     </value>
     <value>
      <string>system.describeMethods</string>
     </value>
     <value>
      <string>system.multiCall</string>
     </value>
     <value>
      <string>system.getCapabilities</string>
     </value>
    </data>
   </array>
  </value>
 </param>
</params>
</methodResponse>

Actual result:
--------------
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 16384 (LWP 19945)]
0x0822d92f in zif_xmlrpc_server_call_method (ht=3, return_value=0x408ef0ac, this_ptr=0x0, return_value_used=1)
    at /linux/devel/php5/ext/xmlrpc/xmlrpc-epi-php.c:1033
1033            set_output_options(&out, *output_opts);
(gdb) bt
#0  0x0822d92f in zif_xmlrpc_server_call_method (ht=3, return_value=0x408ef0ac, this_ptr=0x0, return_value_used=1)
    at /linux/devel/php5/ext/xmlrpc/xmlrpc-epi-php.c:1033
#1  0x082a2583 in zend_do_fcall_common_helper (execute_data=0xbfffd180, op_array=0x408ee410) at /linux/devel/php5/Zend/zend_execute.c:2541
#2  0x082a2d25 in zend_do_fcall_handler (execute_data=0xbfffd180, op_array=0x408ee410) at /linux/devel/php5/Zend/zend_execute.c:2687
#3  0x0829e834 in execute (op_array=0x408ee410) at /linux/devel/php5/Zend/zend_execute.c:1267
#4  0x0827f0f7 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /linux/devel/php5/Zend/zend.c:1018
#5  0x0823f15c in php_execute_script (primary_file=0xbffff580) at /linux/devel/php5/main/main.c:1625
#6  0x082acea7 in main (argc=2, argv=0xbffff614) at /linux/devel/php5/sapi/cli/php_cli.c:910
#7  0x40767bf7 in __libc_start_main () from /lib/i686/libc.so.6