[gvfs] sftp: Fix two compilation warnings

[Colin Walters <walters src gnome org>]

commit 5ab3363029f94f30cf716aa55fe4f581ef67f14d
Author: Colin Walters <walters verbum org>
Date:   Tue May 21 20:27:28 2013 +0100

    sftp: Fix two compilation warnings

 daemon/gvfsbackendsftp.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/daemon/gvfsbackendsftp.c b/daemon/gvfsbackendsftp.c
index 50794d8..120343a 100644
--- a/daemon/gvfsbackendsftp.c
+++ b/daemon/gvfsbackendsftp.c
@@ -1143,7 +1143,7 @@ fail_jobs_and_die (GVfsBackendSftp *backend, GError *error)
 
   g_error_free (error);
 
-  g_vfs_backend_force_unmount (backend);
+  g_vfs_backend_force_unmount ((GVfsBackend*)backend);
 }
 
 static void
@@ -1283,7 +1283,7 @@ send_command_data (GObject *source_object,
   if (res <= 0)
     {
       g_warning ("Error sending command");
-      g_vfs_backend_force_unmount (backend);
+      g_vfs_backend_force_unmount ((GVfsBackend*)backend);
       return;
     }