From 3fcf5bf518e7eb8b78cb88aa4e5a530237bf3c67 Mon Sep 17 00:00:00 2001
From: ljcarlin <louisjcarlin98@gmail.com>
Date: Sat, 9 Dec 2023 16:04:16 +0100
Subject: [PATCH] Feature GMT sphere: fixed another compile warning

---
 example/gmt/sphere_preprocessing.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/example/gmt/sphere_preprocessing.c b/example/gmt/sphere_preprocessing.c
index 7fc8a41af..5e5cc8421 100644
--- a/example/gmt/sphere_preprocessing.c
+++ b/example/gmt/sphere_preprocessing.c
@@ -453,8 +453,8 @@ main (int argc, char **argv)
 {
   int                 progerr;
   const char         *usage;
-  FILE               *output;
-  FILE               *input;
+  FILE               *output = NULL;
+  FILE               *input = NULL;
   p4est_gmt_sphere_geoseg_t *geodesics;
   size_t              n_geodesics;
   size_t              nwritten;