Core/maps: Fix DevScan.total()

Signed-off-by: Martin Stone <martin@d7415.co.uk>
createdb: Dump file archiver needs to check for round as well as noschema.

Signed-off-by: Martin Stone <martin@d7415.co.uk>
(cherry picked from commit 049d6569922b4274c311cbcc2dad29df494b8912)