From 89673f0c0a316db1693b999fe81545270da3dde6 Mon Sep 17 00:00:00 2001
From: Damien Elmes <git@ichi2.net>
Date: Wed, 13 Apr 2011 04:00:48 +0900
Subject: [PATCH] if no tags were provided, just return

---
 anki/deck.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/anki/deck.py b/anki/deck.py
index aa0ccd184..f358fc59e 100644
--- a/anki/deck.py
+++ b/anki/deck.py
@@ -529,6 +529,8 @@ insert or ignore into tags (mod, name) values (%d, :t)""" % intTime(),
     def addTags(self, ids, tags, add=True):
         "Add tags in bulk. TAGS is space-separated."
         newTags = parseTags(tags)
+        if not newTags:
+            return
         # cache tag names
         self.registerTags(newTags)
         # find facts missing the tags