voice: fix receiver null on immediate voiceStateUpdate

src/client/voice/VoiceConnection.js

@@ -113,7 +113,7 @@ class VoiceConnection extends EventEmitter {
      * The voice receiver of this connection
      * @type {VoiceReceiver}
      */
-    this.receiver = null;
+    this.receiver = new VoiceReceiver(this);
 
     this.authenticate();
   }
@@ -418,7 +418,6 @@ class VoiceConnection extends EventEmitter {
     Object.assign(this.authentication, data);
     this.status = VoiceStatus.CONNECTED;
     clearTimeout(this.connectTimeout);
-    this.receiver = new VoiceReceiver(this);
     /**
      * Emitted once the connection is ready, when a promise to join a voice channel resolves,
      * the connection will already be ready.

src/client/voice/networking/VoiceUDPClient.js

@@ -108,6 +108,8 @@ class VoiceConnectionUDPClient extends EventEmitter {
           },
         },
       });
+
+      socket.on('message', buffer => this.voiceConnection.receiver.packets.push(buffer));
     });
 
     const blankMessage = Buffer.alloc(70);

src/client/voice/receiver/Receiver.js

@@ -21,7 +21,6 @@ class VoiceReceiver extends EventEmitter {
      * @param {Error|string} error The error or message to debug
      */
     this.packets.on('error', err => this.emit('debug', err));
-    this.connection.sockets.udp.socket.on('message', buffer => this.packets.push(buffer));
   }
 
   /**