From ca06704a99deb519982738ef53020fbf9dfa2452 Mon Sep 17 00:00:00 2001
From: Robert Smith <robert.smith@florey.edu.au>
Date: Wed, 15 May 2024 19:27:55 +1000
Subject: [PATCH] mrregister: Fix -nl_init option

Error introduced in d81d0ed101c0005519bf33b567395867fc4ce150 as manual refinement of #2829.
---
 cmd/mrregister.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/cmd/mrregister.cpp b/cmd/mrregister.cpp
index 68cdae5908..ffa2f7b7ab 100644
--- a/cmd/mrregister.cpp
+++ b/cmd/mrregister.cpp
@@ -670,7 +670,8 @@ void run() {
     }
   }
 
-  const bool nonlinear_init = !get_options("nl_init").empty();
+  opt = get_options("nl_init");
+  const bool nonlinear_init = !opt.empty();
   if (nonlinear_init) {
 
     if (!do_nonlinear)