Return immediately if the are no records to dump
Return immediately if the are no records to dump

On a fresh or lightly used install there are no records to dump
to CSV which was causing exceptions on the nightly emails

dannguyen/documentcloud,monofox/documentcloud,Teino1978-Corp/Teino1978-Corp-documentcloud,ivarvong/documentcloud,gunjanmodi/documentcloud,ivarvong/documentcloud,Teino1978-Corp/Teino1978-Corp-documentcloud,dannguyen/documentcloud,dannguyen/documentcloud,ivarvong/documentcloud,documentcloud/documentcloud,documentcloud/documentcloud,dannguyen/documentcloud,documentcloud/documentcloud,moodpo/documentcloud,gunjanmodi/documentcloud,monofox/documentcloud,moodpo/documentcloud,Teino1978-Corp/Teino1978-Corp-documentcloud,documentcloud/documentcloud,monofox/documentcloud,moodpo/documentcloud,ivarvong/documentcloud,gunjanmodi/documentcloud,moodpo/documentcloud,Teino1978-Corp/Teino1978-Corp-documentcloud,gunjanmodi/documentcloud,monofox/documentcloud