From: Cristy <urban-warrior@imagemagick.org>
Date: Mon, 18 Sep 2017 19:30:11 +0000 (-0400)
Subject: Unbounded unique colors is problematic
X-Git-Tag: 7.0.7-4~35
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=39e82e9ee6d6dd1a227d416411c0197c489e18a6;p=imagemagick

Unbounded unique colors is problematic
---

diff --git a/coders/histogram.c b/coders/histogram.c
index 21c76d7c2..2ff1775df 100644
--- a/coders/histogram.c
+++ b/coders/histogram.c
@@ -331,7 +331,8 @@ static MagickBooleanType WriteHISTOGRAMImage(const ImageInfo *image_info,
   }
   histogram=(PixelInfo *) RelinquishMagickMemory(histogram);
   option=GetImageOption(image_info,"histogram:unique-colors");
-  if ((option == (const char *) NULL) || (IsStringTrue(option) != MagickFalse))
+  if ((IsHistogramImage(image,exception) != MagickFalse) || 
+      (IsStringTrue(option) != MagickFalse))
     {
       FILE
         *file;