From 9c06bc0aa330b7bd8799618ad5382ee74ca61f18 Mon Sep 17 00:00:00 2001
From: Cristy <urban-warrior@imagemagick.org>
Date: Sat, 28 Oct 2017 14:20:46 -0400
Subject: [PATCH] ...

---
 coders/png.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/coders/png.c b/coders/png.c
index 9d95b0719..6609030f0 100644
--- a/coders/png.c
+++ b/coders/png.c
@@ -4475,7 +4475,7 @@ static Image *ReadOneJNGImage(MngInfo *mng_info,
 
     type[0]='\0';
     (void) ConcatenateMagickString(type,"errr",MagickPathExtent);
-    length=ReadBlobMSBLong(image);
+    length=(size_t) ReadBlobMSBLong(image);
     count=(unsigned int) ReadBlob(image,4,(unsigned char *) type);
 
     if (logging != MagickFalse)
@@ -5380,7 +5380,7 @@ static Image *ReadOneMNGImage(MngInfo* mng_info, const ImageInfo *image_info,
         */
         type[0]='\0';
         (void) ConcatenateMagickString(type,"errr",MagickPathExtent);
-        length=ReadBlobMSBLong(image);
+        length=(size_t) ReadBlobMSBLong(image);
         count=(size_t) ReadBlob(image,4,(unsigned char *) type);
 
         if (logging != MagickFalse)
-- 
2.40.0