From a57a7549fabfb7112510a2ee80a874e988200c32 Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Sun, 12 Mar 2023 16:06:19 +0100
Subject: [PATCH] valid: Allow xmlFreeValidCtxt(NULL)

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

diff --git a/valid.c b/valid.c
index 120627cc..4352a08b 100644
--- a/valid.c
+++ b/valid.c
@@ -879,6 +879,8 @@ xmlValidCtxtPtr xmlNewValidCtxt(void) {
  */
 void
 xmlFreeValidCtxt(xmlValidCtxtPtr cur) {
+    if (cur == NULL)
+        return;
     if (cur->vstateTab != NULL)
         xmlFree(cur->vstateTab);
     if (cur->nodeTab != NULL)