[BUGFIX] TCA tree fail to load with IRRE

The TCA tree element fail to load inside IRRE, in some condition
(when the record is not loaded/opened)

Change-Id: Id077a71e2191b0cf91003611e11dc5aefafab0c9
Resolves: #39035
Releases: 6.2, 6.1
Reviewed-on: https://review.typo3.org/12850
Reviewed-by: Markus Klein
Reviewed-by: Laurent Cherpit
Reviewed-by: Dominique Feyer
Tested-by: Dominique Feyer
Reviewed-by: Fabien Udriot
Reviewed-by: Frans Saris
Tested-by: Frans Saris