logging: solve some warning

7 jobs for download in 5 minutes and 19 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Test
passed #255013
cppcheck

00:00:36

passed #255014
luacheck

00:00:36

passed #255011
system-tests

00:01:39

passed #255012
system-valgrind-tests

00:04:14

passed #255009
unit-tests

00:01:03

passed #255024
unit-valgrind-tests

00:03:49

failed #255010
unit-valgrind-tests

00:01:03