From 98c6349d4af30a444ff90d855a5f44d297600aca Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dag-Erling=20Sm=C3=B8rgrav?= <des@des.no>
Date: Mon, 29 Dec 2014 23:22:54 +0000
Subject: [PATCH] In mpi_zero(), save a memset() if the target is already zero.

---
 lib/mpi/mpi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/mpi/mpi.c b/lib/mpi/mpi.c
index 6bd8364..2d54be7 100644
--- a/lib/mpi/mpi.c
+++ b/lib/mpi/mpi.c
@@ -109,7 +109,7 @@ mpi_zero(cryb_mpi *X)
 
 	if (X->words == NULL) {
 		MPI_FAST_INIT(X);
-	} else {
+	} else if (X->msb != 0) {
 		memset(X->words, 0, X->size);
 		X->neg = 0;
 		X->msb = 0;