From 401f8961758b789a05b890ffac88fa4ae866a37f Mon Sep 17 00:00:00 2001
From: Miroslav Stampar <miroslav.stampar@gmail.com>
Date: Tue, 20 May 2014 13:44:10 +0200
Subject: [PATCH] Patch related to the Issue #696

---
 plugins/generic/databases.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plugins/generic/databases.py b/plugins/generic/databases.py
index 9f057a568..af0796a4f 100644
--- a/plugins/generic/databases.py
+++ b/plugins/generic/databases.py
@@ -173,7 +173,7 @@ class Databases:
             kb.data.cachedDbs.sort()
 
         if kb.data.cachedDbs:
-            kb.data.cachedDbs = list(set(flattenValue(kb.data.cachedDbs)))
+            kb.data.cachedDbs = filter(None, list(set(flattenValue(kb.data.cachedDbs))))
 
         return kb.data.cachedDbs