Fix segfault nexthop parsing when no option is given
Fix segfault nexthop parsing when no option is given

greearb/libnl-ct,thiz11/platform_external_libnl,tgraf/libnl,vyos/libnl3,cyclops8456/libnl3,yinquan529/platform-external-libnl,tklauser/libnl,honsys/libnl,dsahern/libnl,kolyshkin/libnl,HolyShitMan/libnl-1,karlhiramoto/libnl,Distrotech/libnl,mshirley/libnl,houstar/libnl,UnicronNL/libnl3,mshirley/libnl,teto/libnl_old,Distrotech/libnl,thom311/libnl,vyos/libnl3,yinquan529/platform-external-libnl,chitranshi/libnl,HolyShitMan/libnl-1,gxk/libnl,teto/libnl_old,kolyshkin/libnl,xin3liang/platform_external_libnl,Distrotech/libnl,gxk/libnl,gxk/libnl,chitranshi/libnl,kolyshkin/libnl,HolyShitMan/libnl-1,geekboxzone/lollipop_external_libnl,congwang/libnl,Distrotech/libnl,UnicronNL/libnl3,dsahern/libnl,dsahern/libnl,geekboxzone/mmallow_external_libnl,UnicronNL/libnl3,tklauser/libnl,UnicronNL/libnl3,socketpair/libnl,greearb/libnl-ct,tgraf/libnl,teto/libnl_old,tgraf/libnl,honsys/libnl,claudelee/libnl,socketpair/libnl,teto/libnl_old,thom311/libnl,karlhiramoto/libnl,greearb/libnl-ct,houstar/libnl,honsys/libnl,chitranshi/libnl,chitranshi/libnl,claudelee/libnl,thiz11/platform_external_libnl,congwang/libnl,mshirley/libnl,baloo/libnl,HolyShitMan/libnl-1,cfriedt/libnl,xin3liang/platform_external_libnl,karlhiramoto/libnl,bcopeland/android_libnl,android-ia/platform_external_libnl,vyos/libnl3,cfriedt/libnl,geekboxzone/lollipop_external_libnl,claudelee/libnl,houstar/libnl,tgraf/libnl,baloo/libnl,Omegaphora/external_libnl,vyos/libnl3,tklauser/libnl,claudelee/libnl,socketpair/libnl,congwang/libnl,congwang/libnl,baloo/libnl,cyclops8456/libnl3,CyanogenMod/android_external_libnl,mshirley/libnl,Omegaphora/external_libnl,baloo/libnl,geekboxzone/mmallow_external_libnl,CyanogenMod/android_external_libnl,cfriedt/libnl,cfriedt/libnl,karlhiramoto/libnl,tklauser/libnl,bcopeland/android_libnl,honsys/libnl,kolyshkin/libnl,houstar/libnl,cyclops8456/libnl3,cyclops8456/libnl3,thom311/libnl,android-ia/platform_external_libnl,dsahern/libnl