[BUGFIX] Workspaces: Exception with PHP 7

Make the Declaration of
TYPO3\CMS\Workspaces\Controller\ReviewController::initializeView()
compatible with
TYPO3\CMS\Extbase\Mvc\Controller\ActionController::initializeView()

Resolves: #72766
Releases: master, 7.6
Change-Id: I1b7723e61ba7386e95690926b8e30dbd25c0fdb4
Reviewed-on: https://review.typo3.org/46001


Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Reviewed-by: Frank Nägler <frank.naegler@typo3.org>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>