From ceb8f83dee0ce84867825f214a968bd7777d3823 Mon Sep 17 00:00:00 2001
From: Cristy <urban-warrior@imagemagick.org>
Date: Sat, 28 Oct 2017 17:14:51 -0400
Subject: [PATCH] ...

---
 coders/histogram.c | 3 ++-
 configure          | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/coders/histogram.c b/coders/histogram.c
index 2ff1775df..efd602df6 100644
--- a/coders/histogram.c
+++ b/coders/histogram.c
@@ -332,7 +332,8 @@ static MagickBooleanType WriteHISTOGRAMImage(const ImageInfo *image_info,
   histogram=(PixelInfo *) RelinquishMagickMemory(histogram);
   option=GetImageOption(image_info,"histogram:unique-colors");
   if ((IsHistogramImage(image,exception) != MagickFalse) || 
-      (IsStringTrue(option) != MagickFalse))
+      (IsStringTrue(option) != MagickFalse) ||
+      (GetImageOption(image_info,"format") != (const char *) NULL))
     {
       FILE
         *file;
diff --git a/configure b/configure
index 956e6c6e6..6760c1480 100755
--- a/configure
+++ b/configure
@@ -4534,7 +4534,7 @@ MAGICK_PATCHLEVEL_VERSION=9
 
 MAGICK_VERSION=7.0.7-9
 
-MAGICK_GIT_REVISION=21546:62f18fcc2:20171025
+MAGICK_GIT_REVISION=21562:584896c72:20171028
 
 
 # Substitute library versioning
-- 
2.40.0