bug 3378: add some logic to nspam_nham_change to only update spam or ham count when necessary
bug 3378: add some logic to nspam_nham_change to only update spam or ham count when necessary

git-svn-id: d99324e817494df82bb0080d8e7ab74680731a10@20708 13f79535-47bb-0310-9956-ffa450edef68

apache/spamassassin,apache/spamassassin,apache/spamassassin,apache/spamassassin,apache/spamassassin