From 4f8ed0968b1a20546946069f9efc60ce41b13ac3 Mon Sep 17 00:00:00 2001
From: Bastian de Groot <git@de-groot.info>
Date: Sat, 14 Apr 2018 18:28:49 +0200
Subject: [PATCH] [generic] prevent reference before assignment errors

---
 youtube_dl/extractor/generic.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/youtube_dl/extractor/generic.py b/youtube_dl/extractor/generic.py
index 994a6511b..98c9f9015 100644
--- a/youtube_dl/extractor/generic.py
+++ b/youtube_dl/extractor/generic.py
@@ -2009,6 +2009,7 @@ class GenericIE(InfoExtractor):
 
         entries = []
         for it in doc.findall('./channel/item'):
+            next_url = None
             enclosure_nodes = it.findall('./enclosure')
             for e in enclosure_nodes:
                 next_url = e.attrib.get('url')
@@ -2018,7 +2019,7 @@ class GenericIE(InfoExtractor):
             if not enclosure_nodes:
                 next_url = xpath_text(it, 'link', fatal=False)
 
-            if not next_url:
+            if next_url is None:
                 continue
 
             entries.append({