From e90afbec0edac4374d9bf2f84e14017dd0d5c4b8 Mon Sep 17 00:00:00 2001
From: Cristy <urban-warrior@imagemagick.org>
Date: Mon, 2 Jan 2017 19:10:34 -0500
Subject: [PATCH] https://github.com/ImageMagick/ImageMagick/issues/340

---
 MagickCore/image.c | 4 ++--
 coders/png.c       | 3 +--
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/MagickCore/image.c b/MagickCore/image.c
index e6796b7db..6cf47ce13 100644
--- a/MagickCore/image.c
+++ b/MagickCore/image.c
@@ -3678,9 +3678,9 @@ MagickExport MagickBooleanType SyncImage(Image *image,ExceptionInfo *exception)
   if (image->debug != MagickFalse)
     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
   assert(image->signature == MagickCoreSignature);
-  if ((image->storage_class != PseudoClass) ||
-      (image->colormap == (PixelInfo *) NULL))
+  if (image->storage_class != PseudoClass)
     return(MagickFalse);
+  assert(image->colormap != (PixelInfo *) NULL);
   range_exception=MagickFalse;
   status=MagickTrue;
   taint=image->taint;
diff --git a/coders/png.c b/coders/png.c
index 8661ca868..23bdb54bc 100644
--- a/coders/png.c
+++ b/coders/png.c
@@ -2996,8 +2996,7 @@ static Image *ReadOnePNGImage(MngInfo *mng_info,
         }
     }
 
-  if ((image->storage_class == PseudoClass) &&
-      (image_info->ping == MagickFalse))
+  if (image->storage_class == PseudoClass)
     {
       /*
         Initialize image colormap.
-- 
2.40.0