From 3311809e016e59a5111e2868ea1563cb9b05867a Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Fri, 11 Sep 2020 11:18:51 +0200
Subject: [PATCH] fixed a possible crash with airbuf missing

---
 shaders.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/shaders.cpp b/shaders.cpp
index 8af15ecb..b44f9a23 100644
--- a/shaders.cpp
+++ b/shaders.cpp
@@ -416,7 +416,7 @@ void display_data::set_projection(int ed, ld shift) {
   #endif
   
   #if MAXMDIM >= 4
-  if(selected->tAirMap != -1) {
+  if(selected->tAirMap != -1 && airbuf) {
     glActiveTexture(GL_TEXTURE0 + AIR_BINDING);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);