From 4f590f59c131f971207cb5929159b86afcbf0b33 Mon Sep 17 00:00:00 2001
From: terminx <terminx@1a8010ca-5511-0410-912e-c29ae57300e0>
Date: Sun, 7 Oct 2018 05:21:58 +0000
Subject: [PATCH] Fix potential OOB spriteext[] access when checking
 SPREXT_NOTMD to determine whether or not to render a sprite's model, if
 available

git-svn-id: https://svn.eduke32.com/eduke32@7023 1a8010ca-5511-0410-912e-c29ae57300e0
---
 source/build/src/engine.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source/build/src/engine.cpp b/source/build/src/engine.cpp
index 17ba2f9ff..2aecddeee 100644
--- a/source/build/src/engine.cpp
+++ b/source/build/src/engine.cpp
@@ -4804,7 +4804,7 @@ static void classicDrawSprite(int32_t snum)
 
     if ((cstat&48)==48)
         vtilenum = tilenum; // if the game wants voxels, it gets voxels
-    else if (usevoxels && tiletovox[tilenum] != -1 && !(spriteext[spritenum].flags&SPREXT_NOTMD))
+    else if (usevoxels && tiletovox[tilenum] != -1 && spritenum != -1 && !(spriteext[spritenum].flags&SPREXT_NOTMD))
     {
         vtilenum = tiletovox[tilenum];
         cstat |= 48;