From 5f5f9177906c05f7d9049fc6456e1386537edabc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Neuh=C3=A4user?= <ich@danielneuhaeuser.de>
Date: Wed, 16 Jun 2010 23:05:56 +0200
Subject: [PATCH] only decode if possible

---
 sphinx/environment.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sphinx/environment.py b/sphinx/environment.py
index 6ad28ec8a..bf255165e 100644
--- a/sphinx/environment.py
+++ b/sphinx/environment.py
@@ -630,6 +630,8 @@ class BuildEnvironment:
 
         class SphinxSourceClass(FileInput):
             def decode(self_, data):
+                if isinstance(data, unicode):
+                    return data
                 return data.decode(self_.encoding, 'sphinx')
 
             def read(self_):