From c0a04d3552ed36a4b2db2cdd44aff81705405397 Mon Sep 17 00:00:00 2001
From: Andreas Kloeckner <inform@tiker.net>
Date: Sat, 27 Jun 2015 21:18:24 -0500
Subject: [PATCH] Fix error when string returned as NULL in Py3

---
 gen_wrap.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gen_wrap.py b/gen_wrap.py
index 17c0e89..86f135d 100644
--- a/gen_wrap.py
+++ b/gen_wrap.py
@@ -1297,7 +1297,8 @@ def write_method_wrapper(gen, cls_name, meth):
             post_call("_str_ret = None")
 
         if PY3:
-            ret_vals.insert(0, "_str_ret.decode()")
+            ret_vals.insert(0,
+                    "_str_ret.decode() if _str_ret is not None else _str_ret")
         else:
             ret_vals.insert(0, "_str_ret")
 
-- 
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