From a0c8cc7e46cf0a0d8ada1040bf526d6701a5260a Mon Sep 17 00:00:00 2001
From: Heiner Gassen <hg@dynweb.net>
Date: Sat, 23 Jan 2016 22:49:46 +0100
Subject: [PATCH] Fix errors with transparent gifs

Fixes error "imagecolorsforindex(): Color index XXX out of range" by checking with the pallet size of the image.
---
 CImage.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CImage.php b/CImage.php
index 604bc76..4a17f32 100644
--- a/CImage.php
+++ b/CImage.php
@@ -2224,7 +2224,7 @@ private function createImageKeepTransparency($width, $height)
             ? imagecolortransparent($this->image)
             : -1;
 
-        if ($index != -1) {
+	    if ($index >= 0 && $index < imagecolorstotal($this->image)) {
 
             imagealphablending($img, true);
             $transparent = imagecolorsforindex($this->image, $index);