1.5.7- pmessage always returning UNDEFINED message in CLUSTER mode

[klinquist]

Test code:

var Redis = require('ioredis');
var  client = new Redis.Cluster([{ host: "redis-cluster-a.local", port: 6379}]);
var client2 = new Redis.Cluster([{ host: "redis-cluster-a.local", port: 6379}]);

client.psubscribe("events:*");

client.on("pmessage", function (pattern, channel, message){
     console.log("Pattern = " + pattern);
     console.log("Channel = " + channel);
     console.log("Message = " + message);
});

setInterval(function(){
      client2.publish("events:abdd:efg", "myMessage");
},5000);

Results:

Pattern = events:*
Channel = events:abdd:efg
Message = undefined

[klinquist]

I have fixed this and created a pull request:
#88