[BUGFIX] Prevent InvalidArgumentException in user constraints calculation

An additional check is applied to prevent
an InvalidArgumentException for cases where
`checkPid_value` contains an empty string.

Resolves: #102751
Releases: main, 12.4
Change-Id: I906837e75ab505af1e46f55eeccd068c24005e98
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/82309


Reviewed-by: Oliver Bartsch <bo@cedev.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>