If cronErros is empty json_decode will return NULL

[rullzer]

Fixes #9867

Signed-off-by: Roeland Jago Douma roeland@famdouma.nl

[skjnldsv]

❤️ 💃

[MorrisJobke]

Tested and works 👍

[MorrisJobke]

I added some fixes for the tests.

[codecov]

Codecov Report

Merging #9920 into master will decrease coverage by 17.09%.
The diff coverage is 0%.

@@             Coverage Diff              @@
##             master    #9920      +/-   ##
============================================
- Coverage     52.08%   34.99%   -17.1%     
- Complexity    25902    25904       +2     
============================================
  Files          1642     1642              
  Lines         95879    95884       +5     
  Branches       1318     1318              
============================================
- Hits          49942    33550   -16392     
- Misses        45937    62334   +16397

Impacted Files	Coverage Δ	Complexity Δ
settings/Controller/CheckSetupController.php	5.22% <0%> (-52.16%)	76 <2> (+2)
core/Command/Background/Cron.php	0% <0%> (-100%)	1% <0%> (ø)
lib/private/App/AppStore/Bundles/Bundle.php	0% <0%> (-100%)	2% <0%> (ø)
...pFramework/Db/MultipleObjectsReturnedException.php	0% <0%> (-100%)	1% <0%> (ø)
lib/public/RichObjectStrings/Definitions.php	0% <0%> (-100%)	2% <0%> (ø)
apps/dav/lib/Files/Sharing/FilesDropPlugin.php	0% <0%> (-100%)	6% <0%> (ø)
apps/files/lib/Activity/Settings/FileRestored.php	0% <0%> (-100%)	8% <0%> (ø)
...te/Authentication/Token/DefaultTokenCleanupJob.php	0% <0%> (-100%)	1% <0%> (ø)
...s/dav/lib/CalDAV/BirthdayCalendar/EnablePlugin.php	0% <0%> (-100%)	7% <0%> (ø)
apps/dav/lib/CalDAV/Activity/Setting/Event.php	0% <0%> (-100%)	8% <0%> (ø)
... and 533 more

[MorrisJobke]

CI failure is a hiccup -> merging.