From ef37a063790c8439b4d7fd388734dab911565f20 Mon Sep 17 00:00:00 2001
From: Cristy <urban-warrior@imagemagick.org>
Date: Fri, 21 Sep 2018 18:22:02 -0400
Subject: [PATCH] https://github.com/ImageMagick/ImageMagick/pull/1325

---
 MagickCore/fx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/MagickCore/fx.c b/MagickCore/fx.c
index 0658d0913..a6517a83e 100644
--- a/MagickCore/fx.c
+++ b/MagickCore/fx.c
@@ -3135,6 +3135,8 @@ MagickExport Image *FxImage(const Image *image,const char *expression,
   assert(image->signature == MagickCoreSignature);
   if (image->debug != MagickFalse)
     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
+  if (expression == (const char *) NULL)
+    return(CloneImage(image,0,0,MagickTrue,exception));
   fx_info=AcquireFxThreadSet(image,expression,exception);
   if (fx_info == (FxInfo **) NULL)
     return((Image *) NULL);
-- 
2.40.0