From 566db65a91e14848790964f0e89ce5dc97a2773b Mon Sep 17 00:00:00 2001
From: Jack Grigg <jack@z.cash>
Date: Sat, 23 Mar 2019 17:52:31 +1300
Subject: [PATCH] Use a slice instead of a vector in prf_expand()

---
 zcash_primitives/src/keys.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/zcash_primitives/src/keys.rs b/zcash_primitives/src/keys.rs
index 433a415..6510947 100644
--- a/zcash_primitives/src/keys.rs
+++ b/zcash_primitives/src/keys.rs
@@ -12,7 +12,7 @@ pub const PRF_EXPAND_PERSONALIZATION: &'static [u8; 16] = b"Zcash_ExpandSeed";
 
 /// PRF^expand(sk, t) := BLAKE2b-512("Zcash_ExpandSeed", sk || t)
 pub fn prf_expand(sk: &[u8], t: &[u8]) -> Blake2bResult {
-    prf_expand_vec(sk, &vec![t])
+    prf_expand_vec(sk, &[t])
 }
 
 pub fn prf_expand_vec(sk: &[u8], ts: &[&[u8]]) -> Blake2bResult {