cppcheck: fix statements that begin with string constant

Change-Id: I42427beeae06f607e60aeeb7142714fd1f5d740d
Reviewed-on: https://gerrit.libreoffice.org/7110
Reviewed-by: Lionel Elie Mamane <lionel@mamane.lu>
Tested-by: Lionel Elie Mamane <lionel@mamane.lu>