From 9e2e0692ed087dbe0d5f4abbddf3aebd6a11b30e Mon Sep 17 00:00:00 2001
From: Ben Harris <bjh21@bjh21.me.uk>
Date: Tue, 10 Jan 2023 00:22:57 +0000
Subject: [PATCH] Also check for tiny grids in Mines

A zero-size grid isn't acceptable even if someone has generated it for
us.
---
 mines.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mines.c b/mines.c
index c933f49..25b2206 100644
--- a/mines.c
+++ b/mines.c
@@ -261,6 +261,8 @@ static const char *validate_params(const game_params *params, bool full)
      */
     if (full && params->unique && (params->w <= 2 || params->h <= 2))
 	return "Width and height must both be greater than two";
+    if (params->w < 1 || params->h < 1)
+	return "Width and height must both be at least one";
     if (params->w > INT_MAX / params->h)
         return "Width times height must not be unreasonably large";
     if (params->n < 0)