use explicit offset in writeUInt32LE

Author: sidorares

lib/packets/handshake.js

@@ -73,7 +73,7 @@ Handshake.prototype.toPacket = function (sequenceId) {
   packet.writeBuffer(this.authPluginData1);
   packet.writeInt8(0);
   var capabilityFlagsBuffer = Buffer.allocUnsafe(4);
-  capabilityFlagsBuffer.writeUInt32LE(this.capabilityFlags);
+  capabilityFlagsBuffer.writeUInt32LE(this.capabilityFlags, 0);
   packet.writeBuffer(capabilityFlagsBuffer.slice(0, 2));
   packet.writeInt8(this.characterSet);
   packet.writeInt16(this.statusFlags);