From c4f08a3b9a7c6d6fc27f68e5a5c273975d42de76 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Tue, 18 Oct 2022 18:30:02 +0200
Subject: [PATCH] grid_free(): allow being called with grid == NULL

---
 grid.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/grid.c b/grid.c
index 3bcc8a55..7b86e2c1 100644
--- a/grid.c
+++ b/grid.c
@@ -287,6 +287,9 @@ grid_snapshot(const struct grid *grid)
 void
 grid_free(struct grid *grid)
 {
+    if (grid == NULL)
+        return;
+
     for (int r = 0; r < grid->num_rows; r++)
         grid_row_free(grid->rows[r]);