Fix an obvious typo that would cause a NULL pointer dereference.

Signed-off-by: Vince Busam <vbusam@google.com>
---

--- linux-2.6.13.4/net/sunrpc/rpc_pipe.c.orig  2005-11-16 16:48:00.000000000 -0800
+++ linux-2.6.13.4/net/sunrpc/rpc_pipe.c       2005-11-16 16:52:23.000000000 -0800
@@ -51,7 +51,7 @@ __rpc_purge_upcall(struct inode *inode,
                 rpci->ops->destroy_msg(msg);
         }
         while (!list_empty(&rpci->in_upcall)) {
-               msg = list_entry(rpci->pipe.next, struct rpc_pipe_msg, list);
+               msg = list_entry(rpci->in_upcall.next, struct rpc_pipe_msg, list);
                 list_del_init(&msg->list);
                 msg->errno = err;
                 rpci->ops->destroy_msg(msg);