actually use callback in stop

Author: warner

tunnel_start.js

@@ -408,9 +408,11 @@ module.exports = {
     stop: function(cb){
         if(!_.isNull(cbts)){
             cbts.endWrap(cb);
-            cbts = null
+            cbts = null;
+            cb(null,true);
         }else{
             warn('You must start the tunnel first by calling the function "start" with the relevant parameters.');
+            cb(new Error('Tunnel is not started!'));
         }
     },
     status: function(){