fix prune logic

storage/message_store.go

@@ -76,9 +76,9 @@ func (s *SqliteMessageStore) AddMessage(message groups.EncryptedGroupMessage) {
 func (s *SqliteMessageStore) checkPruneMessages() {
 	if s.messageCap != -1 && s.messageCount > s.messageCap {
 		log.Debugf("Message Count: %d / Message Cap: %d, message cap exceeded, pruning oldest 10%...", s.messageCount, s.messageCap)
-		// Delete 10% of messages
-		delCount := s.messageCap / 10
-		stmt, err := s.preparedPruneStatement.Exec(s.messageCap / 10)
+		// Delete 10% of messages (and any overage if the cap was adjusted lower)
+		delCount := (s.messageCount - s.messageCap) + s.messageCap/10
+		stmt, err := s.preparedPruneStatement.Exec(delCount)
 		if err != nil {
 			log.Errorf("%v %q", stmt, err)
 		}
@@ -229,5 +229,7 @@ func InitializeSqliteMessageStore(dbfile string, messageCap int, incMessageCount
 
 	slms.messageCount = slms.MessagesCount()
 
+	slms.checkPruneMessages()
+
 	return slms, nil
 }