Bug 10104 - Followup: fix param check

Bug 10104 - Followup: fix param check

As noted by Mason on bug 10101, the check was not working for zero arguments.

Sponsored-by: Universidad Nacional de Córdoba
Signed-off-by: Mason James <mtj@kohaaloha.com>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>
(cherry picked from commit ca118d57db383f5efebc4d53cba11ccc8af5c9a9)

Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>
(cherry picked from commit 605d0a99b7d0fa91ed321c72c27111b1af7ceef4)

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>