From 04a4f493053da4e3459562920a23abaf7cf4498a Mon Sep 17 00:00:00 2001
From: Pierre-Yves Chibon <pingou@pingoured.fr>
Date: Mar 24 2014 09:19:43 +0000
Subject: When a repo is brand new, the start_id of a pull request might be null


---

diff --git a/progit/model.py b/progit/model.py
index 3192de6..6f80064 100644
--- a/progit/model.py
+++ b/progit/model.py
@@ -188,7 +188,7 @@ class PullRequest(BASE):
         nullable=False)
     start_id = sa.Column(
         sa.String(40),
-        nullable=False)
+        nullable=True)
     stop_id = sa.Column(
         sa.String(40),
         nullable=False)