[ostree] Properly separate sorted xattr names

[Stefan Walter <stefw src gnome org>]

commit c246c4194f4841d4afa41308e3904e00cefed2e0
Author: Stef Walter <stefw redhat com>
Date:   Tue Aug 13 15:40:06 2013 +0200

    Properly separate sorted xattr names
    
    We expect to be handling a string delimited by \0 characters, as
    returned by llistxattr(). So stick to that behavior here.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=705893

 src/libostree/ostree-core.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/src/libostree/ostree-core.c b/src/libostree/ostree-core.c
index eef974a..7fb4e2f 100644
--- a/src/libostree/ostree-core.c
+++ b/src/libostree/ostree-core.c
@@ -158,8 +158,10 @@ canonicalize_xattrs (char *xattr_string, size_t len)
     }
 
   xattrs = g_slist_sort (xattrs, (GCompareFunc) strcmp);
-  for (iter = xattrs; iter; iter = iter->next)
+  for (iter = xattrs; iter; iter = iter->next) {
     g_string_append (result, iter->data);
+    g_string_append_c (result, '\0');
+  }
 
   g_slist_free (xattrs);
   return g_string_free (result, FALSE);