[BUGFIX] The CE File Links (fluid_styled_content) create thumbs for non-image files

This patch resolves problems with usage of {file.type} to determine
if the file type is "unknown" ({file.type =} = 0)
or "text" type ({file.type =} = 1)

Resolves: #79711
Releases: master
Change-Id: I05615b7f10bc5125705e952147696d4e402dd900
Reviewed-on: https://review.typo3.org/54856


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>