From 112c9a110b8f0ca6c897c348d89d7d38c7f87780 Mon Sep 17 00:00:00 2001
From: Scott Giese <scttgs0@gmail.com>
Date: Mon, 23 Nov 2020 16:14:37 -0600
Subject: [PATCH] smell: potential div-by-0

---
 simgear/environment/metar.cxx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/simgear/environment/metar.cxx b/simgear/environment/metar.cxx
index 3a70842e..2a8db9f3 100644
--- a/simgear/environment/metar.cxx
+++ b/simgear/environment/metar.cxx
@@ -777,7 +777,8 @@ bool SGMetar::scanVisibility()
 				return false;
 			if (!scanNumber(&m, &denom, 1, 2))
 				return false;
-			distance += (double)i / denom;
+			if (denom != 0)
+				distance += (double)i / denom;
 		}
 
 		if (!strncmp(m, "SM", 2))