[BUGFIX] Fix undefined variable to evaluate `fileFolder_recursions` correctly

Resolves: #82512
Releases: master, 8.7
Change-Id: Ibfbd1a8e347f5b25871f5d073994bdb2af264051
Reviewed-on: https://review.typo3.org/54174


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>