From 6ab033ef7d6aa5136fff233b450ebb33dc694866 Mon Sep 17 00:00:00 2001
From: Marcian Lytwyn <gna@advcsi.com>
Date: Thu, 12 May 2016 19:41:29 +0000
Subject: [PATCH] Double check for 0 before divide

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/back/branches/gnustep_testplant_branch@39747 72102866-910b-0410-8b05-ffd578937521
---
 Source/gsc/gscolors.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/Source/gsc/gscolors.c b/Source/gsc/gscolors.c
index 24f4bbd..552adc9 100644
--- a/Source/gsc/gscolors.c
+++ b/Source/gsc/gscolors.c
@@ -282,7 +282,17 @@ gsColorToHSB(device_color_t *color)
 	    diff = V - Temp;
 	    if (V == r)
 	      {
-	        H = (g - b)/diff;
+          if (diff == 0.0)
+            {
+              // Invoke same code as r=g=b above...
+              H = 0;
+              // diff == 0 so diff/V == 0
+              // V already == r
+            }
+          else
+            {
+              H = (g - b)/diff;
+            }
 	      }
 	    else if (V == g)
 	      {