From 7573452099e010ccf5ac26cb56e0172046671f91 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 10 May 2017 00:20:02 +0000
Subject: [PATCH] math.c (ruby_lgamma_r): reduce duplicate code

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58645 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 math.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/math.c b/math.c
index 5e2cbe9b74..7be5115b7e 100644
--- a/math.c
+++ b/math.c
@@ -800,11 +800,8 @@ ruby_lgamma_r(const double d, int *sign)
 {
     const double g = lgamma_r(d, sign);
     if (isinf(g)) {
-	if (d == 0.0 && signbit(d)) {
-	    *sign = -1;
-	    return INFINITY;
-	} else if (d == 0.0 && !signbit(d)) {
-	    *sign = 1;
+	if (d == 0.0) {
+	    *sign = signbit(d) ? -1 : +1;
 	    return INFINITY;
 	}
     }