round up maxDataPoints to nearest integer in request. graphite 0.9.x and 0.9.12…

round up maxDataPoints to nearest integer in request. graphite 0.9.x and 0.9.12 seem to treat decimal maxDataPoints badly returning enourmous amounts of data

src/app/panels/graphite/module.js

@@ -230,7 +230,7 @@ function (angular, app, $, _, kbn, moment, timeSeries) {
     $scope.updateTimeRange = function () {
     $scope.updateTimeRange = function () {
       $scope.range = filterSrv.timeRange();
       $scope.range = filterSrv.timeRange();
       $scope.rangeUnparsed = filterSrv.timeRange(false);
       $scope.rangeUnparsed = filterSrv.timeRange(false);
-      $scope.resolution = ($(window).width() * ($scope.panel.span / 12)) / 2;
+      $scope.resolution = Math.ceil(($(window).width() * ($scope.panel.span / 12)) / 2);
       $scope.interval = '10m';
       $scope.interval = '10m';
 
 
       if ($scope.range) {
       if ($scope.range) {