[BUGFIX] Use page uid instead of alias for cHash calculation

To make cHash calculation work again, we need to use the page uid.
However the GET argument might contain a page alias and not the id.
Use the calculated id instead to avoid wrong cHash calculation.

Resolves: #78526
Releases: master, 7.6, 6.2 
Change-Id: Iaa89b7a52a581bd5ac7c0b01049a7f9596258051
Reviewed-on: https://review.typo3.org/50468


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Mathias Brodala <mbrodala@pagemachine.de>
Reviewed-by: Nicole Cordes <typo3@cordes.co>
Tested-by: Nicole Cordes <typo3@cordes.co>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Helmut Hummel <typo3@helhum.io>
Tested-by: Helmut Hummel <typo3@helhum.io>