doctrine/doctrine2 — pull request #930 by joni2back (2014-02-04 12:54:29+00:00)
Title: Transactional callback isn't returning false

Trying to fix any situation that if we've something callback with explicit FALSE return, like:
```php
$rtn = $mgr->transactional(function() {...; return false;});
$rtn //true
```
Should be the return value of the callback method,
If the method is not returning any value (null), then.. we consider the callback was done, then return true.

Regards.