Description:
------------
When converting specific numbers to integers via strings things seem to go a little wrong. (I have also tested this on 5.2.0 on both FreeBSD and Debian)

Reproduce code:
---------------
<?php
$no1 = '18.74';
$no2 = $no1 * 100;
$no3 = (int) $no2;
$no4 = intval($no2);
var_dump($no1);
var_dump($no2);
var_dump($no3);
var_dump($no4);
?>

Expected result:
----------------
string(5) "18.74"
float(1874)
int(1874)
int(1874)

Actual result:
--------------
string(5) "18.74"
float(1874)
int(1873)
int(1873)