PyPy: Fix a TypeError in gevent.idle. Fixes #639.

changelog.rst

@@ -31,6 +31,8 @@ Unreleased
   since they are usually out of the programmer's control and caught
   explicitly. (Programming errors like ``TypeError`` are still
   printed.) Reported in :issue:`617` by Jay Oster and Carlos Sanchez.
+- PyPy: Fix a ``TypeError`` from ``gevent.idle()``. Reported in
+  :issue:`639` by chilun2008.
 
 .. _future: http://python-future.org
 .. _bench_sendall.py: https://raw.githubusercontent.com/gevent/gevent/master/greentest/bench_sendall.py

gevent/corecffi.py

@@ -228,7 +228,8 @@ _watcher_types = ['ev_io',
                   'ev_fork',
                   'ev_async',
                   'ev_child',
-                  'ev_stat', ]
+                  'ev_stat',
+                  'ev_idle', ]
 
 _source = """   // passed to the real C compiler
 #define LIBEV_EMBED 1