[BUGFIX] Fix query to fetch crawler process records.

Sanitize method parameters and use correct defaults before
passing them to DB access API.

Change-Id: I6f8a2f38ce868ac6f2b375af396613cdabfdcb54
Reviewed-on: https://review.typo3.org/30259
Reviewed-by: Roland Behme
Tested-by: Roland Behme