From 07229b74066a0a19ed78cef246c44bc95f79065b Mon Sep 17 00:00:00 2001
From: Henrik Levkowetz <henrik@levkowetz.com>
Date: Tue, 13 Mar 2018 13:52:50 +0000
Subject: [PATCH] Use an empty iterable instead of None in the valid upload
 mime-types settings when there's no required mime type, in order to simplify
 other code.  - Legacy-Id: 14778

---
 ietf/settings.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ietf/settings.py b/ietf/settings.py
index 58fad852a..c5cc8b9dc 100644
--- a/ietf/settings.py
+++ b/ietf/settings.py
@@ -742,7 +742,7 @@ MEETING_VALID_UPLOAD_EXTENSIONS = {
 MEETING_VALID_UPLOAD_MIME_TYPES = {
     'agenda':       ['text/plain', 'text/html', ],
     'minutes':      ['text/plain', 'text/html', 'application/pdf', ],
-    'slides':       None,
+    'slides':       [],
     'bluesheets':   ['application/pdf', 'text/plain', ],
 }