Revert bad change that caused negative probabilities.

diff --git a/src/libstat/classifiers/bayes.c b/src/libstat/classifiers/bayes.c
index b3ffe225432084369a62701f021fccc8eb97182d..acd04f602aa854e3f975c01489d059ae536ea30c 100644 (file)
--- a/src/libstat/classifiers/bayes.c
+++ b/src/libstat/classifiers/bayes.c
@@ -164,7 +164,7 @@ bayes_classify (struct classifier_ctx * ctx,
                                        2 * rt->processed_tokens);
                        s = 1 - inv_chi_square (-2. * rt->ham_prob,
                                        2 * rt->processed_tokens);
-                       final_prob = (s + 1 - h) / 2.;
+                       final_prob = (s + 1.0 - h) / 2.;
                        msg_debug ("<%s> got ham prob %.2f -> %.2f and spam prob %.2f -> %.2f,"
                                        " %L tokens processed of %ud total tokens",
                                        task->message_id, rt->ham_prob, h, rt->spam_prob, s,
@@ -195,8 +195,6 @@ bayes_classify (struct classifier_ctx * ctx,
                                        "unexpected classifier error: cannot select desired statfile");
                        }
                        else {
-                               /* Calculate ham probability correctly */
-                               final_prob = (final_prob - 0.5) * 2;
                                rspamd_snprintf (sumbuf, 32, "%.2f%%", final_prob * 100.);
                                cur = g_list_prepend (NULL, sumbuf);
                                rspamd_task_insert_result (task,