[BUGFIX] Fix regression in ResourceCompressor

Resolves: #53844
Related: #53243
Releases: 6.2, 6.1, 6.0
Change-Id: I7f6a178b063d71c9182316a81e787c9ab5246b8e
Reviewed-on: https://review.typo3.org/25615
Reviewed-by: Markus Klein
Tested-by: Markus Klein