NLM: Fix sparse warnings

 - fs/lockd/xdr4.c:140:27: warning: incorrect type in argument 2 (different
   explicit signedness)
 - fs/lockd/xdr4.c:141:27: warning: incorrect type in argument 2 (different
   explicit signedness)
 - fs/lockd/xdr4.c:432:28: warning: incorrect type in argument 2 (different
   explicit signedness)
 - fs/lockd/xdr4.c:433:28: warning: incorrect type in argument 2 (different
   explicit signedness)
 - fs/lockd/xdr4.c:587:20: warning: symbol 'nlm_version4' was not declared.
   Should it be static?

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/include/linux/lockd/xdr4.h b/include/linux/lockd/xdr4.h
index dd12b4c..12bfe09 100644
--- a/include/linux/lockd/xdr4.h
+++ b/include/linux/lockd/xdr4.h
@@ -42,5 +42,6 @@
 int	nlmclt_encode_cancargs(struct rpc_rqst *, u32 *, struct nlm_args *);
 int	nlmclt_encode_unlockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
  */
+extern struct rpc_version nlm_version4;
 
 #endif /* LOCKD_XDR4_H */