Bug 34838: Only check for status in status graph if request has a status

Bug 34838: Only check for status in status graph if request has a status

This check is required because when the existing_statuses method checks for the existing status_alias, it'll leave out the status from the query, so the status will be NULL for those particular query results when calling strings_map, throwing a warning

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>