[jhbuild] use NUL instead of /dev/null on win32

[Frederic Peters <fpeters src gnome org>]

commit 08d2dd26466498cc1b0a8272c531c8ca17acbbb8
Author: Frédéric Péters <fpeters 0d be>
Date:   Thu May 21 19:46:24 2009 +0200

    use NUL instead of /dev/null on win32
---
 tests/tests.py |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/tests/tests.py b/tests/tests.py
index 73eed1a..0a8b009 100644
--- a/tests/tests.py
+++ b/tests/tests.py
@@ -565,8 +565,11 @@ def restore_environ(env):
 STDOUT_FILENO = 1
 
 def with_stdout_hidden(func):
+    null_device = '/dev/null'
+    if sys.platform.startswith('win'):
+        null_device = 'NUL'
     old_fd = os.dup(STDOUT_FILENO)
-    new_fd = os.open('/dev/null', os.O_WRONLY)
+    new_fd = os.open(null_device, os.O_WRONLY)
     os.dup2(new_fd, STDOUT_FILENO)
     os.close(new_fd)
     try: