Fix bug parsing change-restored/abandoned events
Fix bug parsing change-restored/abandoned events

The change-restored/change-abandoned events don't include
any patch information in the JSON doc..

Signed-off-by: Daniel P. Berrange <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

Dacelonid/gerrymander,agx/gerrymander,agx/gerrymander,berrange/gerrymander,Dacelonid/gerrymander,berrange/gerrymander