Added safeguard against failure in __del__.
diff --git a/Lib/urllib.py b/Lib/urllib.py
index 2583089..4f455f8 100644
--- a/Lib/urllib.py
+++ b/Lib/urllib.py
@@ -70,6 +70,8 @@
 ftpcache = {}
 class URLopener:
 
+	tempcache = None		# So close() in __del__() won't fail
+
 	# Constructor
 	def __init__(self, proxies=None):
 		if proxies is None: