Bug? mailreaver.crm returns wrong exit code with --stats_only

On FreeBSD-6.3 I'm running

 X-CRM114-Version:_20080326-BlameSentansoken

I'm integrating it with Qmail's ".qmail" mechanism which can look at a
process' returned exit status value and file mail directly into a
mailbox.  So I've set mailfilter.cf with:

  :rejected_mail_exit_code: /0/
  :accepted_mail_exit_code: /1/
  :unsure_mail_exit_code:   /1/
  :program_fault_exit_code: /111/

This works, returning 0 for spam and 1 for good mail with
mailreaver.crm, *unless* I specify the --stats_only option, in which case
it *always* returns 0.  If I use the --report_only option instead, it
returns 0 and 1 appropriately.

If I use mailfilter.crm it returns the correct codes with no options,
with --stats_only and with --report_only.

So it seems there's some bug with mailreaver.crm which is causing it not
to return the :accepted_mail_exit_code: for good mail when --stats_only
is used.  I'm too much of a CRM114 newbie to be able to parse and
understand what mailreaver.crm's doing, but here are some tests to demo
the problem:

  > cat /tmp/spam.mail | crm -u $HOME/crm114 mailreaver.crm  >/dev/null
  > echo $?
  0
  > cat /tmp/good.mail | crm -u $HOME/crm114 mailreaver.crm  >/dev/null
  > echo $?
  1

  > cat /tmp/spam.mail | crm -u $HOME/crm114 mailreaver.crm  --stats_only
  -49.54
  > echo $?
  0
  > cat /tmp/good.mail | crm -u $HOME/crm114 mailreaver.crm  --stats_only
   75.85
  > echo $?
  0                   <=============== PROBLEM, should be 1

  > cat /tmp/spam.mail | crm -u $HOME/crm114 mailreaver.crm --report_only
  X-CRM114-Version: 20080326-BlameSentansoken ( TRE 0.7.5 (LGPL) ) MR-2AB8DE83 
  X-CRM114-CacheID: sfid-20080605_11520_4E4A6F3D 
  X-CRM114-Status: SPAM  ( -48.36  )
  > echo $?
  0

  > cat /tmp/good.mail | crm -u $HOME/crm114 mailreaver.crm --report_only
  X-CRM114-Version: 20080326-BlameSentansoken ( TRE 0.7.5 (LGPL) ) MR-2AB8DE83 
  X-CRM114-CacheID: sfid-20080605_11521_D01B8240 
  X-CRM114-Status: GOOD (  77.48  )
  > echo $?
  1                  <============== OK, works properly with this option


When I run mailfilter the same way, the behavior is consistent, correct:

  > cat /tmp/spam.mail | crm -u $HOME/crm114 mailfilter.crm  >/dev/null
  > echo $?
  0
  > cat /tmp/good.mail | crm -u $HOME/crm114 mailfilter.crm  >/dev/null
  > echo $?
  1

  > cat /tmp/spam.mail | crm -u $HOME/crm114 mailfilter.crm  --stats_only
  -50.4788 
  > echo $?
  0
  > cat /tmp/good.mail | crm -u $HOME/crm114 mailfilter.crm  --stats_only
  75.8535 
  > echo $?
  1

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