cope with weird Content-Length values returned from servers by
ignoring them; e.g. Zope sometimes returns 13497L
diff --git a/Lib/httplib.py b/Lib/httplib.py
index eac59e3..1fe358e 100644
--- a/Lib/httplib.py
+++ b/Lib/httplib.py
@@ -166,7 +166,10 @@
         # NOTE: RFC 2616, S4.4, #3 says we ignore this if tr_enc is "chunked"
         length = self.msg.getheader('content-length')
         if length and not self.chunked:
-            self.length = int(length)
+            try:
+                self.length = int(length)
+            except ValueError:
+                self.length = None
         else:
             self.length = None