From ae47797f8332e573d3e3e36cf2be9e6bbdf29553 Mon Sep 17 00:00:00 2001
From: Simon Howard <fraggle@soulsphere.org>
Date: Tue, 17 Dec 2024 15:30:06 -0500
Subject: [PATCH] Add missing #define constant for null key

---
 src/hash-table.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/hash-table.h b/src/hash-table.h
index 735c754..9b22147 100644
--- a/src/hash-table.h
+++ b/src/hash-table.h
@@ -78,6 +78,11 @@ typedef void *HashTableKey;
  */
 typedef void *HashTableValue;
 
+/**
+ * A null @ref HashTableKey.
+ */
+#define HASH_TABLE_KEY_NULL ((void *) 0)
+
 /**
  * A null @ref HashTableValue.
  */