charts.js: Fix sending wrong params to query

Signed-off-by: Diego Giovane Pasqualin <dpasqualin@c3sl.ufpr.br>

web/routes/charts.js

@@ -68,12 +68,11 @@ exports.get_data = function(req, res) {
     for (var i=0; i<queries.length; i++) {
         var query = queries[i];
         if ( query.type === req.params.type ) {
-            var params = [];
-            for (var p in query.params) {
-                params.push(p || null);
+            for (var p=0; p<query.params.length; p++) {
+                query.params[p] = query.params[p] || null;
             }
 
-            req.db.queryFromFile(query.file, params, function (result) {
+            req.db.queryFromFile(query.file, query.params, function (result) {
                 req.db.done();
                 res.json(result.rows);
             });