From 4ea0eebfe5eb13945ea0689349185bb0b68e3c1b Mon Sep 17 00:00:00 2001
From: Zack Middleton <zack@cloemail.com>
Date: Sun, 8 Apr 2018 20:52:19 -0500
Subject: [PATCH] Fix nullptr dereference in front of nullptr check in
 FS_CheckPak0

Found using LLVM sanitizer. Reported by Dominic "lonkamikaze" Fandrey
and David "devnexen" CARLIER.
---
 code/qcommon/files.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/code/qcommon/files.c b/code/qcommon/files.c
index 16869afc..e5d91671 100644
--- a/code/qcommon/files.c
+++ b/code/qcommon/files.c
@@ -3458,17 +3458,17 @@ static void FS_CheckPak0( void )
 {
 	searchpath_t	*path;
 	pack_t		*curpack;
+	const char	*pakBasename;
 	qboolean founddemo = qfalse;
 	unsigned int foundPak = 0, foundTA = 0;
 
 	for( path = fs_searchpaths; path; path = path->next )
 	{
-		const char* pakBasename = path->pack->pakBasename;
-
 		if(!path->pack)
 			continue;
 
 		curpack = path->pack;
+		pakBasename = curpack->pakBasename;
 
 		if(!Q_stricmpn( curpack->pakGamename, "demoq3", MAX_OSPATH )
 				&& !Q_stricmpn( pakBasename, "pak0", MAX_OSPATH ))