Merge pull request #294 from wavify/setquota-undefined-quotalist

Handle undefined quotalist when set quota on some imap server (e.g. cyrus)

lib/Connection.js

@@ -879,7 +879,7 @@ Connection.prototype.setQuota = function(quotaRoot, limits, cb) {
       if (err)
         return cb(err);
 
-      cb(err, quotalist[0]);
+      cb(err, quotalist ? quotalist[0] : limits);
     }
   );
 };