Rearrange getHost function

regexp.go

@@ -262,13 +262,14 @@ func (v *routeRegexpGroup) setMatch(req *http.Request, m *RouteMatch, r *Route)
 
 // getHost tries its best to return the request host.
 func getHost(r *http.Request) string {
-	if !r.URL.IsAbs() {
+	if r.URL.IsAbs() {
+		return r.URL.Host
+	}
 	host := r.Host
 	// Slice off any port information.
 	if i := strings.Index(host, ":"); i != -1 {
 		host = host[:i]
 	}
 	return host
-	}
+
-	return r.URL.Host
 }