Fix interface enumeration on posix

The last interface wouldn't be considered.

llarp/net/posix.cpp

@@ -32,7 +32,7 @@ namespace llarp::net
       if (getifaddrs(&addrs))
         throw std::runtime_error{fmt::format("getifaddrs(): {}", strerror(errno))};
 
-      for (auto next = addrs; next and next->ifa_next; next = next->ifa_next)
+      for (auto next = addrs; next; next = next->ifa_next)
         visit(next);
 
       freeifaddrs(addrs);