CI 3.2.0_dev and captcha_helper

Hi,

I use the captcha  on Captchalib.php  library
correctif IN  /system/core/captcha_helper.php
Severity: 8192

Message: Implicit conversion from float 37.5 to int loses precision

Filename: helpers/captcha_helper.php

Line Number: 324 
$x = mt_rand(0, intval($img_width / ($length / 1.5)));
Line Number: 318
$x = mt_rand(0, intval($img_width / ($length / 3)));   
        

this good?