[BUGFIX] Use correct check in search if list module is available

The check if the list module is available for the user must be
extended to check for false as well.

Resolves: #79974
Releases: master, 7.6
Change-Id: Icd1e2c2cff3f37ce6763bc4f64d4011443226a68
Reviewed-on: https://review.typo3.org/51808


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Thomas Hohn <thomas@hohn.dk>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>