Bug 34838: Only call strings_map if status_alias is not undef in status_alias cycle

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>
(cherry picked from commit 4231def42e1b1256428407f7c4b53da896ba29d4)
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>