EllisLab/CodeIgniter — pull request #2762 by bhavik-patel-indianic (2013-12-13 04:10:18+00:00)
Title: Update Hooks.php

Bug :
it was throwing fatal error if specified class or class function does not exist in file

change
1.there should be require_once which moved below the !file_exists if statement
2. change in line from 195 to 204

Solve
now it will return false