From 3f08a018cb1a23657b9ef6bd1b8a9f9dc8f1b616 Mon Sep 17 00:00:00 2001
From: Pierre Joye <pierre.php@gmail.com>
Date: Mon, 31 Jan 2022 11:46:15 +0700
Subject: [PATCH] =?UTF-8?q?Fix=20#815,=20gd=5Ftopal,=20explicit=20null=20d?=
 =?UTF-8?q?ereferenced=20(kind=20of=20false=20positiv=E2=80=A6=20(#816)?=
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* Fix #815, gd_topal, explicit null dereferenced (kind of false positive however it does hurt to add that check)

* Fix #815, != NULL
---
 src/gd_topal.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/gd_topal.c b/src/gd_topal.c
index b355e2d..0fff552 100644
--- a/src/gd_topal.c
+++ b/src/gd_topal.c
@@ -1703,6 +1703,9 @@ static int gdImageTrueColorToPaletteBody (gdImagePtr oim, int dither, int colors
 	select_colors (oim, nim, cquantize, colorsWanted);
 	zeroHistogram (cquantize->histogram);
 	if (dither) {
+		if (cquantize->error_limiter == NULL) {
+			goto outOfMemory;
+		}
 		pass2_fs_dither (oim, nim, cquantize);
 	} else {
 		pass2_no_dither (oim, nim, cquantize);