From 641b5e7de84e5766fcd0a78f2eef23e81469d9b7 Mon Sep 17 00:00:00 2001
From: Sparks29032 <Sparks29032@gmail.com>
Date: Tue, 12 Nov 2024 17:35:25 -0500
Subject: [PATCH] Prevent duplication of morphshift

---
 src/diffpy/pdfmorph/pdfmorphapp.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/diffpy/pdfmorph/pdfmorphapp.py b/src/diffpy/pdfmorph/pdfmorphapp.py
index 8f99c04..2a25a5f 100755
--- a/src/diffpy/pdfmorph/pdfmorphapp.py
+++ b/src/diffpy/pdfmorph/pdfmorphapp.py
@@ -364,14 +364,14 @@ def single_morph(parser, opts, pargs, stdout_flag=True):
         config["stretch"] = stretch_in
         refpars.append("stretch")
     # Shift
+    if opts.hshift is not None or opts.vshift is not None:
+        chain.append(morphs.MorphShift())
     if opts.hshift is not None:
         hshift_in = opts.hshift
-        chain.append(morphs.MorphShift())
         config["hshift"] = hshift_in
         refpars.append("hshift")
     if opts.vshift is not None:
         vshift_in = opts.vshift
-        chain.append(morphs.MorphShift())
         config["vshift"] = vshift_in
         refpars.append("vshift")
     # Smear