Bug 34838: Only call strings_map if status_alias is not undef in status_alias cycle
Because its highly likely that at least one request will have status_alias null in the database, the select MAX query will always return at least one result with NULL status_alias, throwing a warning, so we skip that
Signed-off-by: Nick Clemens <nick@bywatersolutions.com> Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io> Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>