Fixed undefined diff func.

Author: ctubio

src/admin/trades.ts

@@ -61,7 +61,7 @@ var TradesListController = ($scope : TradesScope, $log : ng.ILogService, subscri
         headerRowHeight: 20,
         columnDefs: [
             {width: 75, field:'time', displayName:'t', cellFilter: 'momentShortDate',
-                sortingAlgorithm: (a: moment.Moment, b: moment.Moment) => a.diff(b),
+                sortingAlgorithm: (a: moment.Moment, b: moment.Moment) => (moment.isMoment(a) ? a : moment(a)).diff(b),
                 sort: { direction: uiGridConstants.DESC, priority: 1} },
             {width: 50, field:'price', displayName:'px', cellFilter: 'currency', cellClass: (grid, row, col, rowRenderIndex, colRenderIndex) => {
                 if (row.entity.side === 'K') return (row.entity.price > row.entity.allocprice) ? "sell" : "buy"; else return "";