fix: undefined property in unmatched host (#178)

Author: laverdet

lib/router.js

@@ -483,7 +483,7 @@ Router.prototype.allowedMethods = function (options = {}) {
     return next().then(function () {
       const allowed = {};
 
-      if (!ctx.status || ctx.status === 404) {
+      if (ctx.matched && (!ctx.status || ctx.status === 404)) {
         for (let i = 0; i < ctx.matched.length; i++) {
           const route = ctx.matched[i];
           for (let j = 0; j < route.methods.length; j++) {