Fixed some cppcheck defects

Change-Id: I25fd6aba9d76df98d20b9a1bb4c9d3c1bf6f84bb
Reviewed-on: https://gerrit.libreoffice.org/14487Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Tested-by: Noel Grandin <noelgrandin@gmail.com>