AutoLoad not loading the classes. Uncaught Error: Class 'Esendex\Model\DispatchMessage' not found

[yet-another-steve]

I have the AutoLoad.php located here:
/path2website/classes/Esendex/AutoLoad.php
and get "Uncaught Error: Class 'Esendex\Model\DispatchMessage' not found"
this is caused in AutoLoad.php by the line
$path = ESENDEX_HOME . self::SPLIT_DIR . implode(self::SPLIT_DIR, $parts) . '.php';
creating a path to the class looking like this:
/path2website/classes/Esendex/Esendex/Model/DispatchMessage.php
Note the double /Esendex/ in the path.

I fixed it by removing the /Esendex from the static var ESENDEX_HOME by changing the define statement to this:
define('ESENDEX_HOME', str_replace(DIRECTORY_SEPARATOR."Esendex","", dirname(__FILE__)));
which then corrects the subsequent $path= assignment to
/path2website/classes/Esendex/Model/DispatchMessage.php

and all is well.