Process events even without 'id' in them

This was breaking syndic matching.  The syndic would return its list of
expected minions, but that event does not have 'id' in it.  Thus, the
master would not process that event and it would either result in huge
delays for minion returns or the returns for minions under syndics
wouldn't appear at all on the CLI.

salt/client/__init__.py

@@ -1030,7 +1030,7 @@ class LocalClient(object):
         syndic_wait = 0
         while True:
             raw = self.event.get_event(timeout, jid)
-            if raw is not None and 'id' in raw:
+            if raw is not None:
                 if 'minions' in raw.get('data', {}):
                     minions.update(raw['data']['minions'])
                     continue