[issue70] Netgraph warnings patch

[Antonio Huete Jimenez (via DragonFly issue tracker)]

Antonio Huete Jimenez <tuxillo at quantumachine.net> added the comment:

Similar fix (taken also from FBSD) was committed by Sascha.
55f2596a38f96f64ba970622676c97b419119192

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status: chatting -> resolved

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