code review 5294074: src/pkg/[n-z]*: gofix -r error

src/pkg/net/interface_darwin.go

 // Copyright 2011 The Go Authors.  All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 // Network interface identification for Darwin
 
 package net
 
 import (
         "os"
         "syscall"
 )
 
 // If the ifindex is zero, interfaceMulticastAddrTable returns
 // addresses for all network interfaces.  Otherwise it returns
 // addresses for a specific interface.
-func interfaceMulticastAddrTable(ifindex int) ([]Addr, os.Error) {
+func interfaceMulticastAddrTable(ifindex int) ([]Addr, error) {
         var (
                 tab   []byte
                 e     int
                 msgs  []syscall.RoutingMessage
                 ifmat []Addr
         )
 
         tab, e = syscall.RouteRIB(syscall.NET_RT_IFLIST2, ifindex)
         if e != 0 {
                 return nil, os.NewSyscallError("route rib", e)
@@ skipping 13 matching lines @@
                                         return nil, err
                                 }
                                 ifmat = append(ifmat, ifma...)
                         }
                 }
         }
 
         return ifmat, nil
 }
 
-func newMulticastAddr(m *syscall.InterfaceMulticastAddrMessage) ([]Addr, os.Error) {
+func newMulticastAddr(m *syscall.InterfaceMulticastAddrMessage) ([]Addr, error) {
         var ifmat []Addr
 
         sas, e := syscall.ParseRoutingSockaddr(m)
         if e != 0 {
                 return nil, os.NewSyscallError("route sockaddr", e)
         }
 
         for _, s := range sas {
                 switch v := s.(type) {
                 case *syscall.SockaddrInet4:
                         ifma := &IPAddr{IP: IPv4(v.Addr[0], v.Addr[1], v.Addr[2], v.Addr[3])}
                         ifmat = append(ifmat, ifma.toAddr())
                 case *syscall.SockaddrInet6:
                         ifma := &IPAddr{IP: make(IP, IPv6len)}
                         copy(ifma.IP, v.Addr[:])
                         // NOTE: KAME based IPv6 protcol stack usually embeds
                         // the interface index in the interface-local or link-
                         // local address as the kernel-internal form.
                         if ifma.IP.IsInterfaceLocalMulticast() ||
                                 ifma.IP.IsLinkLocalMulticast() {
                                 // remove embedded scope zone ID
                                 ifma.IP[2], ifma.IP[3] = 0, 0
                         }
                         ifmat = append(ifmat, ifma.toAddr())
                 }
         }
 
         return ifmat, nil
 }