Fixed a wrong condition for required parameters.
Fixed a wrong condition for required parameters.

--HG--
extra : convert_revision : svn%3A2327b42d-5241-43d6-9e2a-de5ac946f064%4025016

--HG--
extra : convert_revision : d9a3e8eaab624daae47e9a38de10be538e91bf21

jkorell/psmsi,jkorell/psmsi,heaths/psmsi,SamB/psmsi,SamB/psmsi,heaths/psmsi