From aef1ff4372e080f9287209a4cdc8d13a275fccaa Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Wed, 6 Mar 2024 19:30:43 +0100
Subject: [PATCH] string: Fix xmlStrncatNew(NULL, "")

This should return "" not NULL.
---
 xmlstring.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/xmlstring.c b/xmlstring.c
index e30c084ab..8b0880259 100644
--- a/xmlstring.c
+++ b/xmlstring.c
@@ -499,10 +499,10 @@ xmlStrncatNew(const xmlChar *str1, const xmlChar *str2, int len) {
         if (len < 0)
             return(NULL);
     }
-    if ((str2 == NULL) || (len == 0))
-        return(xmlStrdup(str1));
     if (str1 == NULL)
         return(xmlStrndup(str2, len));
+    if ((str2 == NULL) || (len == 0))
+        return(xmlStrdup(str1));
 
     size = xmlStrlen(str1);
     if ((size < 0) || (size > INT_MAX - len))