Fix undefined variable error

Author: grncdr

lib/Connection.js

@@ -2,6 +2,7 @@ var Net              = require('net');
 var ConnectionConfig = require('./ConnectionConfig');
 var Protocol         = require('./protocol/Protocol');
 var SqlString        = require('./protocol/SqlString');
+var Sequences        = require('./protocol/sequences');
 var EventEmitter     = require('events').EventEmitter;
 var Util             = require('util');