SUNRPC: rpcb_getport_sync() passes incorrect address size to rpc_create()

The variable "sin" is a pointer, so sizeof(sin) is the size of a pointer,
not the size of thing that sin points to.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

net/sunrpc/rpcb_clnt.c

@@ -228,7 +228,7 @@ int rpcb_getport_sync(struct sockaddr_in *sin, u32 prog, u32 vers, int prot)
 		__FUNCTION__, NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
 
 	rpcb_clnt = rpcb_create(NULL, (struct sockaddr *)sin,
-				sizeof(sin), prot, 2, 0);
+				sizeof(*sin), prot, 2, 0);
 	if (IS_ERR(rpcb_clnt))
 		return PTR_ERR(rpcb_clnt);