[CLEANUP] Replace count with empty in multiple extensions, part II

Replace occurences of count() with matching empty() pendants.
Affected extensions:
- info_pagetsconfig
- lang
- linkvalidator
- mediace
- opendocs
- recordlist
- reports
- saltedpasswords

Resolves: #67952
Releases: master
Change-Id: Ifa3e8a24a2be4d4c6373d18e446ed219cac4c30c
Reviewed-on: http://review.typo3.org/40954


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Stephan Großberndt <stephan@grossberndt.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>