baseserver: accept 'long' arguments in addition to 'int'

gevent/baseserver.py

@@ -66,7 +66,7 @@ class BaseServer(object):
         elif hasattr(spawn, 'spawn'):
             self.pool = spawn
             self._spawn = spawn.spawn
-        elif isinstance(spawn, int):
+        elif isinstance(spawn, (int, long)):
             from gevent.pool import Pool
             self.pool = Pool(spawn)
             self._spawn = self.pool.spawn