firewaller: don't call Unit.AssignedMachineId if we don't have a valid machine
firewaller: don't call Unit.AssignedMachineId if we don't have a valid machine
thomnico/juju,cherylj/juju,frankban/juju-tmp,fwereade/juju,reedobrien/store,howbazaar/juju,wwitzel3/juju,mjs/juju,marcoceppi/juju,waigani/juju,cmars/juju,marcmolla/juju,axw/juju,anastasiamac/juju,gabriel-samfira/juju,frankban/juju-tmp,dimitern/juju,cherylj/juju,cloud-green/juju,marcmolla/juju,mikemccracken/juju,Altoros/juju-vmware,macgreagoir/juju,mhilton/juju,anastasiamac/juju,waigani/juju,davecheney/juju,kat-co/juju,cmars/juju,perrito666/juju,mattyw/juju,bz2/juju,howbazaar/juju,bogdanteleaga/juju,sinzui/juju,ericsnowcurrently/juju,tych0/juju,cloud-green/juju,tsakas/juju,jrwren/juju,mjs/juju,frankban/juju,davecheney/juju,mjs/juju,Altoros/juju-vmware,voidspace/juju,mattyw/juju,AdamIsrael/juju,tych0/juju,waigani/juju,dimitern/juju,mjs/juju,makyo/juju,dooferlad/juju,tasdomas/juju,ericsnowcurrently/juju,kat-co/juju,reedobrien/juju,dimitern/juju,mhilton/juju,thomnico/juju,ericsnowcurrently/juju,mhilton/juju-juju,ericsnowcurrently/juju,howbazaar/juju,mattyw/juju,bac/juju,Altoros/juju-cloudsigma,macgreagoir/juju,voidspace/juju,bz2/juju,perrito666/juju,reedobrien/juju,dooferlad/juju,sinzui/juju,Altoros/juju-vmware,Altoros/juju-cloudsigma,cmars/juju,marcoceppi/juju,mjs/juju,fwereade/juju,AdamIsrael/juju,axw/juju,thomnico/juju,Altoros/juju-vmware,waigani/juju,tasdomas/juju,dooferlad/juju,frankban/juju,perrito666/juju,alesstimec/juju,frankban/juju-tmp,AdamIsrael/juju,howbazaar/juju,tsakas/juju,makyo/juju,marcmolla/juju,davecheney/juju,perrito666/juju,reedobrien/juju,frobware/juju,davecheney/juju,alesstimec/juju,marcoceppi/juju,mikemccracken/juju,rogpeppe/juju,bz2/juju,bz2/juju,bac/juju,voidspace/juju,kat-co/juju,mhilton/juju,gabriel-samfira/juju,frankban/juju-tmp,dimitern/juju,mhilton/juju-juju,mhilton/juju-juju,tsakas/juju,axw/juju,bac/juju,marcmolla/juju,mikemccracken/juju,bogdanteleaga/juju,cloud-green/juju,bogdanteleaga/juju,mjs/juju,tasdomas/juju,cmars/juju,alesstimec/juju,macgreagoir/juju,rogpeppe/juju,tych0/juju,frankban/juju,mhilton/juju-juju,anastasiamac/juju,frobware/juju,bac/juju,bz2/juju,makyo/juju,Altoros/juju-cloudsigma,dooferlad/juju,macgreagoir/juju,cherylj/juju,sinzui/juju,alesstimec/juju,gabriel-samfira/juju,mhilton/juju,mattyw/juju,makyo/juju,dooferlad/juju,voidspace/juju,reedobrien/juju,sinzui/juju,frobware/juju,thomnico/juju,kat-co/juju,mikemccracken/juju,cherylj/juju,macgreagoir/juju,bac/juju,dimitern/juju,mjs/juju,jrwren/juju,kat-co/juju,tsakas/juju,tych0/juju,bogdanteleaga/juju,frankban/juju,alesstimec/juju,anastasiamac/juju,marcoceppi/juju,tasdomas/juju,rogpeppe/juju,perrito666/juju,gabriel-samfira/juju,Altoros/juju-cloudsigma,wwitzel3/juju,axw/juju,ericsnowcurrently/juju,axw/juju,wwitzel3/juju,jrwren/juju,howbazaar/juju,mikemccracken/juju,fwereade/juju,marcmolla/juju,anastasiamac/juju,gabriel-samfira/juju,cloud-green/juju,reedobrien/juju,wwitzel3/juju,frankban/juju,fwereade/juju,AdamIsrael/juju