Move default: to end of switch

This helps prevent silly people like myself from asking about it on
IRC. Basically it is a coding convention, I've moved the default to
the end of the switch block.

Change-Id: I43ace7cb9fee4cff0b12be8d3f6b3669b270b898
Reviewed-on: https://gerrit.libreoffice.org/7277
Reviewed-by: Tor Lillqvist <tml@collabora.com>
Tested-by: Tor Lillqvist <tml@collabora.com>