Index: click_filter.module
===================================================================
--- click_filter.module	(revision 834)
+++ click_filter.module	(working copy)
@@ -65,9 +65,11 @@
     return CLICK_BOT;
   }
   // See if the click came from an owner of the ad.
-  $result = db_query('SELECT oid FROM {ad_owners} WHERE aid = %d AND uid = %d', $aid, $user->uid);
-  if (db_result($result)) {
-    return CLICK_OWNER;
+  if (module_exists('ad_owners')) {
+	  $result = db_query('SELECT oid FROM {ad_owners} WHERE aid = %d AND uid = %d', $aid, $user->uid);
+	  if (db_result($result)) {
+	    return CLICK_OWNER;
+	  }
   }
   // See if the click came from a duplicate uid or ip address.
   if ($user->uid) {
@@ -82,7 +84,7 @@
   return CLICK_VALID;
 }
 
-/** 
+/**
  * Implementation of hook_perm().
  */
 function click_filter_perm() {