Ignore negative return values from CurlMulti.timeout.

bdarnell · bdarnell · commit 4059df20998f · 2013-04-13T17:20:07.000-04:00
pycurl has a wraparound bug that can turn very large timeouts into negative numbers. Closes tornadoweb#712.
diff --git a/tornado/curl_httpclient.py b/tornado/curl_httpclient.py
@@ -172,7 +172,7 @@ def _handle_timeout(self):
         # libcurl is ready.  After each timeout, resync the scheduled
         # timeout with libcurl's current state.
         new_timeout = self._multi.timeout()
-        if new_timeout != -1:
+        if new_timeout >= 0:
             self._set_timeout(new_timeout)
 
     def _handle_force_timeout(self):
