Move fcntl import to avoid high level ImportErrors on Windows

Fixes #5.
(cherry picked from commit ec2aedac71)

CHANGES

@@ -1,5 +1,11 @@
 Temporary, post-Paramiko changelog while we get our sh!t together.
 
+## ssh 1.7.13 (2012-MM-DD)
+
+* Moved a `fcntl` import closer to where it's used to help avoid `ImportError`
+  problems on Windows platforms. Thanks to Jason Coombs for the catch +
+  suggested fix.
+
 ## ssh 1.7.12 (2012-02-10)
 
 * Added an IO loop sleep() call to avoid needless CPU usage when agent

paramiko/agent.py

@@ -28,7 +28,6 @@ import threading
 import time
 import tempfile
 import stat
-import fcntl
 from select import select
 
 from paramiko.ssh_exception import SSHException
@@ -119,6 +118,7 @@ class AgentProxyThread(threading.Thread):
             raise
 
     def _communicate(self):
+        import fcntl
         oldflags = fcntl.fcntl(self.__inr, fcntl.F_GETFL)
         fcntl.fcntl(self.__inr, fcntl.F_SETFL, oldflags | os.O_NONBLOCK)
         while not self._exit: