From d60192531e3ee6b492151f6aa8edd481ebddcdf7 Mon Sep 17 00:00:00 2001
From: Ben Harris <bjh21@bjh21.me.uk>
Date: Wed, 11 Jan 2023 09:35:51 +0000
Subject: [PATCH] Insist that Flood grids must have non-zero size

---
 flood.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/flood.c b/flood.c
index 67181a8..1b0fa6e 100644
--- a/flood.c
+++ b/flood.c
@@ -210,6 +210,8 @@ static const char *validate_params(const game_params *params, bool full)
 {
     if (params->w < 2 && params->h < 2)
         return "Grid must contain at least two squares";
+    if (params->w < 1 || params->h < 1)
+        return "Width and height must be at least one";
     if (params->w > INT_MAX / params->h)
         return "Width times height must not be unreasonably large";
     if (params->colours < 3 || params->colours > 10)