fix jsdoc

lib/server.js

@@ -916,9 +916,10 @@ WalletService.prototype._normalizeTxHistory = function(txs) {
  * Retrieves all transactions (incoming & outgoing) in the range (maxTs-minTs)
  * Times are in UNIX EPOCH
  *
- * @param {Object} opts.minTs (defaults to 0)
- * @param {Object} opts.maxTs (defaults to now)
- * @param {Object} opts.limit
+ * @param {Object} opts
+ * @param {Number} opts.minTs (defaults to 0)
+ * @param {Number} opts.maxTs (defaults to now)
+ * @param {Number} opts.limit
  * @returns {TxProposal[]} Transaction proposals, first newer
  */
 WalletService.prototype.getTxHistory = function(opts, cb) {