Minor syntax fixes (#1994)

echo.go

@@ -654,7 +654,7 @@ func (e *Echo) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	// Acquire context
 	c := e.pool.Get().(*context)
 	c.Reset(r, w)
-	h := NotFoundHandler
+	var h func(Context) error
 
 	if e.premiddleware == nil {
 		e.findRouter(r.Host).Find(r.Method, GetPath(r), c)

router.go

@@ -624,6 +624,4 @@ func (r *Router) Find(method, path string, c Context) {
 	}
 	ctx.path = currentNode.ppath
 	ctx.pnames = currentNode.pnames
-
-	return
 }