I'm 99% sure valgrind was complaining incorrectly, but this should fi…

…x it in any case.

git-svn-id: svn://svn.powerdns.com/pdns/trunk/pdns@2829 d19b8d6e-7fed-0310-83ef-9ca221ded41b

pdns/nameserver.cc

@@ -215,7 +215,8 @@ void UDPNameserver::send(DNSPacket *p)
   struct cmsghdr *cmsg;
   struct iovec iov;
   char cbuf[256];
-
+  memset(cbuf, 0, sizeof(cbuf)); // not strictly necessary, but valgrind triggers on this sometimes otherwise
+
   /* Set up iov and msgh structures. */
   memset(&msgh, 0, sizeof(struct msghdr));
   iov.iov_base = (void*)buffer.c_str();