From 8a2e88390bee4f602e81fe310f90e503c34f1f8f Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Tue, 9 Jan 2024 07:47:57 +0900
Subject: [PATCH] mruby-math: reduce the scope of a local variable

---
 mrbgems/mruby-math/src/math.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mrbgems/mruby-math/src/math.c b/mrbgems/mruby-math/src/math.c
index fdb533dcf..26a6eaa40 100644
--- a/mrbgems/mruby-math/src/math.c
+++ b/mrbgems/mruby-math/src/math.c
@@ -137,7 +137,7 @@ erfc(double x)
   double q1;
   double q2 = b/d;
   double n = 1.0;
-  double t;
+
   if (fabs(x) < 2.2) {
     return 1.0 - erf(x);
   }
@@ -145,7 +145,7 @@ erfc(double x)
     return 2.0 - erfc(-x);
   }
   do {
-    t  = a*n+b*x;
+    double t = a*n+b*x;
     a  = b;
     b  = t;
     t  = c*n+d*x;