[BUGFIX] Add missing initialization of GraphicalFunctions

Add missing initialization of the GraphicalFunctions helper
during image processing.

Resolves: #83058
Releases: master, 8.7
Change-Id: Ic5552c573f866faf3dcb0e0bc11012d83c805033
Reviewed-on: https://review.typo3.org/54717


Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Frank Naegler <frank.naegler@typo3.org>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>