[gvfs/gnome-2-28] Avoid crash when printf function is called with a NULL string. Fixes

[Alexander Larsson <alexl src gnome org>]

commit 7e7149c52d954be4c341857d576aea6e462fa319
Author: Brian Cameron <Brian Cameron sun com>
Date:   Fri Oct 9 10:48:58 2009 -0500

    Avoid crash when printf function is called with a NULL string.  Fixes
    bug #580825.
    (cherry picked from commit cd99d7d11fef5488cdd1e8b96829459dd2afad15)

 daemon/gvfsbackendsmbbrowse.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/daemon/gvfsbackendsmbbrowse.c b/daemon/gvfsbackendsmbbrowse.c
index e4760e6..97d3c99 100644
--- a/daemon/gvfsbackendsmbbrowse.c
+++ b/daemon/gvfsbackendsmbbrowse.c
@@ -1494,7 +1494,7 @@ g_vfs_backend_smb_browse_class_init (GVfsBackendSmbBrowseClass *klass)
     }
 #endif
 
-  DEBUG ("g_vfs_backend_smb_browse_class_init - default workgroup = '%s'\n", default_workgroup);
+  DEBUG ("g_vfs_backend_smb_browse_class_init - default workgroup = '%s'\n", default_workgroup ? default_workgroup : "NULL");
 }
 
 void