Don't try to stop a stopped VM when undefining

pvc.py

@@ -205,11 +205,13 @@ def undefine_vm(dom_name, dom_uuid):
         click.echo('ERROR: Could not find VM "{}" in the cluster!'.format(message_name))
         return
 
+    current_vm_state = zk.get('/domains/{}/state'.format(dom_uuid))[0].decode('ascii')
+    if current_vm_state != 'stop':
         click.echo('Forcibly stopping VM "{}".'.format(dom_uuid))
         # Set the domain into stop mode
         transaction = zk.transaction()
         transaction.set_data('/domains/{}/state'.format(dom_uuid), 'stop'.encode('ascii'))
-    results = transaction.commit()
+        transaction.commit()
 
         # Wait for 3 seconds to allow state to flow to all hypervisors
         click.echo('Waiting for cluster to update.')