[sysadmin-bin] fix typo checking for xz support

[Olav Vitters <ovitters src gnome org>]

commit 529f57609d96d22f974c03ea81dc72f44ec2b55d
Author: Olav Vitters <olav vitters nl>
Date:   Mon Jan 19 16:03:48 2015 +0100

    fix typo checking for xz support

 ftpadmin |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/ftpadmin b/ftpadmin
index a1de53c..0c145e4 100755
--- a/ftpadmin
+++ b/ftpadmin
@@ -250,7 +250,7 @@ class XzTarFile(tarfile.TarFile):
         t._extfileobj = False
         return t
 
-if not hasattr(tarfile.TarFile, 'xvopen'):
+if not hasattr(tarfile.TarFile, 'xzopen'):
     tarfile.open = XzTarFile.open