PowerDNS/pdns — pull request #1405 by fobser (2014-05-12 09:21:07+00:00)
Title: Only access cmsg->cmsg_len when cmsg is initialized.

When neither IP_PKTINFO nor IP_SENDSRCADDR are defined cmsg is not
initialized and leads to random crashes. While there initialize cmsg
to NULL which would have made it easier to find this bug.