too many CIDR blocks in whiteclnt

Hello --

Since updating to DCC 1.2.18 earlier today, I'm getting a fair number of
warnings that say "too many CIDR blocks in line 110 of /var/dcc/whiteclnt."
That line reads:

ok   ip   199.239.138.0/24

which looks to me like it should be OK and has been in my whiteclnt
file for quite some time.

There seems to be a periodicity to the warnings of just about 300 seconds,
depending on the arrival times of actual messages.

I don't know if the periodicity is significant, but by setting up a process
to send mail once a second, I can pretty much guarantee a "too many CIDR
blocks" warning once every 305 seconds or so:

  $ tail -f /var/log/maillog | grep "line 110"
  Nov 21 16:33:46 is1 dccm[45664]: too many CIDR blocks in line 110
  Nov 21 16:38:52 is1 dccm[45664]: too many CIDR blocks in line 110
  Nov 21 16:43:55 is1 dccm[45664]: too many CIDR blocks in line 110
  Nov 21 16:49:00 is1 dccm[45664]: too many CIDR blocks in line 110
  Nov 21 16:54:06 is1 dccm[45664]: too many CIDR blocks in line 110

Other than this, things seem to be working fine.

Thanks.

-- John