[REVIEW-3-6] don't import old and new cond format data

[Markus Mohrhard]

Hey,

[1] prevents the import of old cond format data if the new ones are
already imported.

Regards,
Markus

[1] http://cgit.freedesktop.org/libreoffice/core/commit/?id=dfc68037328fbc1ec45d18b25822b59a2134285a