Fix segfault because of accessing NULL pointer

radvd-project / radvd

radvd | Official repository: https://github.com/radvd-project/radvd

https://radvd.litech.org/

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Closed hxx-fetch closed 5 years ago

hxx-fetch commented 5 years ago

add check in add_auto_prefixes if ifaddrs.ifa_addrs == NULL Fixes #112