handle read event before close event in case pipe sends us something and close pipe in the same time.

fixes a regression caused by gajim-0.14-check-error.patch
(Peter could not connect to gmail.com, reported in
 https://admin.fedoraproject.org/updates/gajim-0.14.1-2.fc14)

# HG changeset patch
# User Yann Leboulanger <asterix@lagaule.org>
# Date 1288345298 -7200
# Node ID 50980325f73d04f447f679834f4e88cf6806954a
# Parent  56dcfc87d01e39cbcd30eba453e3e9d8efcaed17

diff -r 56dcfc87d01e -r 50980325f73d src/common/xmpp/idlequeue.py
--- a/src/common/xmpp/idlequeue.py	Fri Oct 29 11:37:07 2010 +0200
+++ b/src/common/xmpp/idlequeue.py	Fri Oct 29 11:41:38 2010 +0200
@@ -388,6 +388,16 @@
             self.unplug_idle(fd)
             return False
 
+        read_write = False
+        if flags & PENDING_READ:
+            #print 'waiting read on %d, flags are %d' % (fd, flags)
+            obj.pollin()
+            read_write = True
+
+        elif flags & PENDING_WRITE and not flags & IS_CLOSED:
+            obj.pollout()
+            read_write = True
+
         if flags & IS_CLOSED:
             # io error, don't expect more events
             self.remove_timeout(obj.fd)
@@ -395,15 +405,8 @@
             obj.pollend()
             return False
 
-        if flags & PENDING_READ:
-            #print 'waiting read on %d, flags are %d' % (fd, flags)
-            obj.pollin()
+        if read_write:
             return True
-
-        if flags & PENDING_WRITE:
-            obj.pollout()
-            return True
-
         return False
 
     def process(self):