From 592078545e1f18c64b66bad6077df84585d50945 Mon Sep 17 00:00:00 2001
From: Damien Elmes <git@ichi2.net>
Date: Fri, 25 Nov 2011 14:20:18 +0900
Subject: [PATCH] don't fail when upgrading an empty deck

---
 anki/upgrade.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/anki/upgrade.py b/anki/upgrade.py
index d4a22b1ad..adf446aa4 100644
--- a/anki/upgrade.py
+++ b/anki/upgrade.py
@@ -609,7 +609,8 @@ update cards set due = cast(
         if col.models.randomNew():
             col.sched.randomizeCards()
         # update insertion id
-        col.conf['nextPos'] = col.db.scalar("select max(id) from notes")+1
+        col.conf['nextPos'] = (
+            col.db.scalar("select max(id) from notes") or 0)+1
         col.save()
 
         # optimize and finish