Jail/jid can be None (when the jail is not running)

Author: igalic

iocage/lib/Jail.py

@@ -1056,7 +1056,7 @@ def running(self) -> bool:
         return self.jid is not None
 
     @property
-    def jid(self) -> int:
+    def jid(self) -> typing.Optional[int]:
         """
         The JID of a running jail or None if the jail is not running
         """