[nautilus] file: don't leak a NautilusFileUndoInfo

[Cosimo Cecchi <cosimoc src gnome org>]

commit ec16bfbd79f6fc966162ca2733c2f27d2d455406
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Mon Sep 17 10:14:34 2012 -0400

    file: don't leak a NautilusFileUndoInfo
    
    nautilus_file_undo_manager_set_action() takes a ref to the undo info
    object, so we are leaking an extra reference.

 libnautilus-private/nautilus-file.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/libnautilus-private/nautilus-file.c b/libnautilus-private/nautilus-file.c
index 9c0ab13..046a1c1 100644
--- a/libnautilus-private/nautilus-file.c
+++ b/libnautilus-private/nautilus-file.c
@@ -1667,6 +1667,7 @@ nautilus_file_operation_free (NautilusFileOperation *op)
 
 	if (op->undo_info != NULL) {
 		nautilus_file_undo_manager_set_action (op->undo_info);
+		g_object_unref (op->undo_info);
 	}
 
 	g_free (op);