[BUGFIX] Fix configuration transmission in Thumbnails

Change-Id: Icf6a23c5c31380b4aaee64ad2dd78730b326a548
Releases: 3.2
Resolves: #62185
Reviewed-on: http://review.typo3.org/33316
Reviewed-by: Fabien Udriot <fabien.udriot@ecodev.ch>
Tested-by: Fabien Udriot <fabien.udriot@ecodev.ch>