crell authored Apr 13, 2022 and Benni Mack committed Apr 18, 2022

'BackendUtility::getProcessedValue()' currently implicitly
returns mixed, whereas makeDiffDisplay() requires a string.
Using force-casting in '\TYPO3\CMS\Impexp\ImportExport' for
the value before passing it is the most straightforward fix
for now.

Resolves: #97373
Related: #97210
Related: #97372
Releases: main
Change-Id: I89cd60ed227cf285040c118b741951734e0fa8a7
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/74287


Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Benni Mack <benni@typo3.org>