From 6b81a4b8825f3496e220be071d2b80829a274b9e Mon Sep 17 00:00:00 2001
From: Bill Currie <bill@taniwha.org>
Date: Thu, 7 Apr 2022 22:30:19 +0900
Subject: [PATCH] [renderer] Don't try to animate lightstyles that aren't there

Prevents a segfault when running the renderer via qwaq-x11.
---
 libs/video/renderer/r_light.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libs/video/renderer/r_light.c b/libs/video/renderer/r_light.c
index d9a96915e..2f063e9d9 100644
--- a/libs/video/renderer/r_light.c
+++ b/libs/video/renderer/r_light.c
@@ -126,6 +126,10 @@ R_AnimateLight (void)
 {
 	int         i, j, k;
 
+	if (!r_data->lightstyle) {
+		return;
+	}
+
 	// light animations
 	// 'm' is normal light, 'a' is no light, 'z' is double bright
 	i = (int) (r_data->realtime * 10);