fix code labels in histogram

Makefile

@@ -1,4 +1,4 @@
 test:
 	./node_modules/jasme/run.js
 lint:
-	node_modules/eslint/bin/eslint.js .
+	node_modules/eslint/bin/eslint.js src

package.json

@@ -1,6 +1,6 @@
 {
   "name": "express-prom-bundle",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "description": "express middleware with popular prometheus metrics in one bundle",
   "main": "src/index.js",
   "keywords": [

src/index.js

@@ -61,7 +61,6 @@ function main(opts) {
                 "http_request_duration",
                 "number of http responses labeled with status code",
                 {
-                    labels: ["bar"],
                     buckets: [0.003, 0.03, 0.1, 0.3, 1.5, 10]
                 }
             );
@@ -87,8 +86,8 @@ function main(opts) {
         let timer, labels;
 
         if (metrics["http_request_duration"]) {
-            timer = metrics["http_request_duration"].startTimer(labels);
             labels = {"status_code": 0};
+            timer = metrics["http_request_duration"].startTimer(labels);
         }
 
         if (req.path == "/metrics") {