'GETINFO exit-policy/full' fails when disconnected

On legacy/trac#25423 (closed) dmr noticed that 'GETINFO exit-policy/full' fails when tor lacks an address...

ProtocolError: GETINFO response didn't have an OK status:
router_get_my_routerinfo returned NULL

No big whoop, but for this method to be useful I need for it to always tell us what our effective policy is (maybe that's 'reject :' when disconnected?). In the meantime Stem is using the following as a workaround...

https://gitweb.torproject.org/stem.git/commit/?id=f61e913