ensure that agents logged in via the manager interface are stored in the persistence database (related to issue #6301)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@10137 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_agent.c

@@ -2207,6 +2207,8 @@ static int action_agent_callback_login(struct mansession *s, struct message *m)
 		ast_device_state_changed("Agent/%s", p->agent);
 		ast_mutex_unlock(&p->lock);
 		p = p->next;
+		if (persistent_agents)
+			dump_agents();
 	}
 	ast_mutex_unlock(&agentlock);