From 54d70a280d3a6eebe82f56e45a31ee8791c6ba38 Mon Sep 17 00:00:00 2001
From: Cristy <urban-warrior@imagemagick.org>
Date: Mon, 2 Jan 2017 15:34:59 -0500
Subject: [PATCH] https://github.com/ImageMagick/ImageMagick/issues/340

---
 MagickCore/image.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/MagickCore/image.c b/MagickCore/image.c
index 5c5c07e58..e6796b7db 100644
--- a/MagickCore/image.c
+++ b/MagickCore/image.c
@@ -3678,7 +3678,8 @@ MagickExport MagickBooleanType SyncImage(Image *image,ExceptionInfo *exception)
   if (image->debug != MagickFalse)
     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
   assert(image->signature == MagickCoreSignature);
-  if (image->storage_class == DirectClass)
+  if ((image->storage_class != PseudoClass) ||
+      (image->colormap == (PixelInfo *) NULL))
     return(MagickFalse);
   range_exception=MagickFalse;
   status=MagickTrue;
-- 
2.40.0