feat:update RedissonRateLimiter

Signed-off-by: zhangzhongguo <1969751050@qq.com>

redisson/src/main/java/org/redisson/RedissonRateLimiter.java

@@ -274,6 +274,9 @@ public class RedissonRateLimiter extends RedissonExpirable implements RRateLimit
                 }
             }
 
+            if (map.size()==0){
+                return new RateLimiterConfig(RateType.OVERALL, 0L, 0L);
+            }
             RateType type = RateType.values()[Integer.valueOf(map.get("type"))];
             Long rateInterval = Long.valueOf(map.get("interval"));
             Long rate = Long.valueOf(map.get("rate"));