From 35065b9127adf06b0a19286ff7ccc87f14cff10d Mon Sep 17 00:00:00 2001
From: aiju <devnull@localhost>
Date: Fri, 4 May 2018 21:41:16 +0000
Subject: [PATCH] mpmagadd: force output sign +1 always

---
 sys/src/libmp/port/mpadd.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/src/libmp/port/mpadd.c b/sys/src/libmp/port/mpadd.c
index 9a1ccde66..3672c2c34 100644
--- a/sys/src/libmp/port/mpadd.c
+++ b/sys/src/libmp/port/mpadd.c
@@ -21,10 +21,12 @@ mpmagadd(mpint *b1, mpint *b2, mpint *sum)
 	m = b2->top;
 	if(n == 0){
 		mpassign(mpzero, sum);
+		sum->sign = 1;
 		return;
 	}
 	if(m == 0){
 		mpassign(b1, sum);
+		sum->sign = 1;
 		return;
 	}
 	mpbits(sum, (n+1)*Dbits);