--- a/bin/pvl.wlan-syslog	Fri Jul 05 02:03:12 2013 +0300
+++ b/bin/pvl.wlan-syslog	Fri Jul 05 02:32:00 2013 +0300
@@ -96,7 +96,7 @@
                 last_seen   = timestamp,
         )
 
-        if self.DB_COUNT :
+        if self.DB_COUNT is not None :
             query = query.values(count=1)
         
         # -> id