NPE during pubsub usage in cluster

src/main/java/org/redisson/connection/MasterSlaveConnectionManager.java

@@ -140,15 +140,17 @@ public class MasterSlaveConnectionManager implements ConnectionManager {
     
     private final Semaphore freePubSubLock = new Semaphore(1);
     
-    public MasterSlaveConnectionManager(MasterSlaveServersConfig cfg, Config config) {
-        this(config);
-        init(cfg);
-
+    {
         for (int i = 0; i < locks.length; i++) {
             locks[i] = new Semaphore(1);
         }
     }
 
+    public MasterSlaveConnectionManager(MasterSlaveServersConfig cfg, Config config) {
+        this(config);
+        init(cfg);
+    }
+
     public MasterSlaveConnectionManager(Config cfg) {
         Version.logVersion();