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d43384d238
`od_hex_dump()` is called if `hdr_len < pkt->size` to print the rest after `hdr_len` of `pkt`. So if we just leave `hdr_len = 0` instead of calling `od_hex_dump()` for every other NETTYPE, we achieve the same effect. As it is more effective (and already done in some cases) to re-set `hdr_len` when the header was printed, we initialize `hdr_len` first with 0 now.