[extensions-web] Return None if the files are the same

[Jasper St. Pierre <jstpierre src gnome org>]

commit 08daf6d137f6c53a72f9ef1760352f3136ff2946
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Tue Nov 15 13:49:17 2011 -0500

    Return None if the files are the same

 sweettooth/review/views.py |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/sweettooth/review/views.py b/sweettooth/review/views.py
index f3420c8..df4d793 100644
--- a/sweettooth/review/views.py
+++ b/sweettooth/review/views.py
@@ -93,6 +93,10 @@ def get_zipfiles(version):
 def get_diff(old_zipfile, new_zipfile, filename, highlight):
     old, new = old_zipfile.open(filename, 'r'), new_zipfile.open(filename, 'r')
     oldcontent, newcontent = old.read(), new.read()
+
+    if oldcontent == newcontent:
+        return None
+
     old.close()
     new.close()