[mhonarc] fix logic to ensure from is only checked after a blank

[Olav Vitters <ovitters src gnome org>]

commit 29ff53264afed85c27823034214dd291054d0277
Author: Olav Vitters <olav vitters nl>
Date:   Wed Feb 13 13:31:15 2013 +0100

    fix logic to ensure from is only checked after a blank

 archive.py |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/archive.py b/archive.py
index e12a166..3569ebe 100755
--- a/archive.py
+++ b/archive.py
@@ -202,6 +202,8 @@ class Archiver:
 
                         msg.seek(0)
                         msg.truncate(0)
+                else:
+                    blank = False
 
                 msg.write(line)