Description:
------------
When a function is set to receive EV_SIGNAL events, the raised signal should be the first parameter to the PHP callback function.  For me, the value is always zero.

[ Source: "Signal number or resource indicating the stream. "  - http://www.php.net/manual/en/function.event-set.php ]

Test script:
---------------
<?php
/**
 * Run this script, then press  ctrl-c in your terminal to trigger the
 * bug
 */
$base = event_base_new();
$ev = event_new();
event_set($ev, SIGINT, EV_SIGNAL, 'handler');
event_base_set($ev, $base);
event_add($ev);
event_base_loop($base);
echo "Complete\n";



function handler ($fd, $events, $params) {
    printf("I've just recived notification of signal %d by events mask %d\n", $fd, $events);
}

Expected result:
----------------
^CI've just recived notification of signal 2 by events mask 8
Complete

Actual result:
--------------
^CI've just recived notification of signal 0 by events mask 8
Complete