fix bug: GatewayIpVersionNextHopRouter is 255.255.255.255 sometimes
fix bug: GatewayIpVersionNextHopRouter is 255.255.255.255 sometimes

JackSlateur/AS-Stats,manuelkasper/AS-Stats,manuelkasper/AS-Stats,clobrother/AS-Stats,clobrother/AS-Stats,clobrother/AS-Stats,JackSlateur/AS-Stats,JackSlateur/AS-Stats,manuelkasper/AS-Stats,clobrother/AS-Stats,JackSlateur/AS-Stats,manuelkasper/AS-Stats