[PATCH] Print progress message to stderr, not stdout

["Karl Hasselström" <kha@treskal.com>]

Printing progress messages to stdout causes them to get mixed up with
the actual output of the program. Using stderr is much better, since
the user can then redirect the two components separately.

Signed-off-by: Karl Hasselström <kha@treskal.com>
---

I noticed this when creating a patch with "stg export -s" for the
import regression test.

 stgit/git.py |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/stgit/git.py b/stgit/git.py
index 2a6ae91..8d88769 100644
--- a/stgit/git.py
+++ b/stgit/git.py
@@ -186,8 +186,8 @@ def __tree_status(files = None, tree_id
     """Returns a list of pairs - [status, filename]
     """
     if verbose:
-        print 'Checking for changes in the working directory...',
-        sys.stdout.flush()
+        sys.stderr.write('Checking for changes in the working directory...')
+        sys.stderr.flush()
 
     refresh_index()
 
@@ -226,7 +226,7 @@ def __tree_status(files = None, tree_id
             cache_files.append(fs)
 
     if verbose:
-        print 'done'
+        print >> sys.stderr, 'done'
 
     return cache_files