[BUGFIX] Allow typesList=0 when using makeCategorizable

[BUGFIX] Allow typesList=0 when using makeCategorizable

Due to a wrong condition which is using !empty() typesList=0 is not possible.
Change the condition to check this the correct way.

Resolves: #76141
Releases: master, 7.6
Change-Id: Ieca9bd2a59e42d112c4eb8058bd76da8d73b86ab
Reviewed-on: https://review.typo3.org/48364
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Michael Oehlhof <typo3@oehlhof.de>
Tested-by: Michael Oehlhof <typo3@oehlhof.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>