fixed NPE #200

parse/src/main/java/com/alibaba/otter/canal/parse/inbound/mysql/MysqlEventParser.java

@@ -395,7 +395,7 @@ public class MysqlEventParser extends AbstractMysqlEventParser implements CanalE
                     // binlog定位位点失败,可能有两个原因:
                     // 1. binlog位点被删除
                     // 2.vip模式的mysql,发生了主备切换,判断一下serverId是否变化,针对这种模式可以发起一次基于时间戳查找合适的binlog位点
-                    boolean case2 = (standbyInfo.getAddress() == null)
+                    boolean case2 = (standbyInfo == null || standbyInfo.getAddress() == null)
                                     && logPosition.getPostion().getServerId() != null
                                     && !logPosition.getPostion().getServerId().equals(findServerId(mysqlConnection));
                     if (case2) {