From baea3414a39b5b79379d8cfc8d8de1cecb9eed3d Mon Sep 17 00:00:00 2001
From: Pierre Joye <pajoye@php.net>
Date: Wed, 18 Dec 2002 21:13:21 +0000
Subject: [PATCH] Fix a crash while using an invalid color with imagesetstyle,
 see the sample script in the manual to reproduce it :)

---
 ext/gd/libgd/gd.c | 24 +++++++++++-------------
 1 file changed, 11 insertions(+), 13 deletions(-)

diff --git a/ext/gd/libgd/gd.c b/ext/gd/libgd/gd.c
index 8c6f35d756..f70a1e985b 100644
--- a/ext/gd/libgd/gd.c
+++ b/ext/gd/libgd/gd.c
@@ -589,21 +589,19 @@ gdImageColorDeallocate (gdImagePtr im, int color)
   im->open[color] = 1;
 }
 
-void
-gdImageColorTransparent (gdImagePtr im, int color)
+void gdImageColorTransparent (gdImagePtr im, int color)
 {
-  if (!im->trueColor)
-    {
-      if (im->transparent != -1)
-	{
-	  im->alpha[im->transparent] = gdAlphaOpaque;
-	}
-      if (color != -1)
-	{
-	  im->alpha[color] = gdAlphaTransparent;
+	if (!im->trueColor) {
+		if (im->transparent != -1) {
+			im->alpha[im->transparent] = gdAlphaOpaque;
+		}
+		if (color > -1 && color<=gdMaxColors) {
+			im->alpha[color] = gdAlphaTransparent;
+		} else {
+			return;
+		}
 	}
-    }
-  im->transparent = color;
+	im->transparent = color;
 }
 
 void
-- 
2.50.1