Fix bug in copy_stream which broke docroot requests with the standalone

server on linux.

* lib/viewcvs.py
  (copy_stream):
    when copying to the sys.stdout, make sure to use the current
    sys.stdout file object instead of the file object cached by
    python as a default argument


git-svn-id: http://viewvc.tigris.org/svn/viewvc/trunk@1017 8cb11bc2-c004-0410-86c3-e597b4017df7

lib/viewcvs.py

@@ -984,7 +984,9 @@ def retry_read(src, reqlen=CHUNK_SIZE):
         continue
     return chunk
   
-def copy_stream(src, dst=sys.stdout):
+def copy_stream(src, dst=None):
+  if dst is None:
+    dst = sys.stdout
   while 1:
     chunk = retry_read(src)
     if not chunk: