Description:
------------
When I use the optional peername parameter in stream_socket_accept() the script segfaults. Everything works fine when I don't use this parameter. The segfault occurs immediately when I call the function, before any connection with a client can be established.

Reproduce code:
---------------
#!/usr/bin/php5
<?
  $server = stream_socket_server("tcp://0.0.0.0:12345");
  $client = stream_socket_accept($server, 3, $peername);
?>

Expected result:
----------------
nothing

Actual result:
--------------
Segmentation fault