From af1aea7e71aadbdba62a201869f9f135ebf96570 Mon Sep 17 00:00:00 2001
From: vuonojenmustaturska <naksu@youzen.ext.b2.fi>
Date: Sat, 14 Oct 2017 00:29:50 +0300
Subject: [PATCH] Small lighting perf tweak (#31635)

* lightshit

* Revert "lightshit"

This reverts commit 25a1b6e4a104546c6393d3c472c0412f7580fe96.

* bfghsfg

* kreegah

* honk
---
 code/modules/lighting/lighting_corner.dm | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/code/modules/lighting/lighting_corner.dm b/code/modules/lighting/lighting_corner.dm
index c51e7feb7a..7288d47280 100644
--- a/code/modules/lighting/lighting_corner.dm
+++ b/code/modules/lighting/lighting_corner.dm
@@ -90,6 +90,9 @@ GLOBAL_LIST_INIT(LIGHTING_CORNER_DIAGONAL, list(NORTHEAST, SOUTHEAST, SOUTHWEST,
 	lum_g += delta_g
 	lum_b += delta_b
 
+	if ((delta_r+delta_g+delta_b) == 0)
+		return
+
 	if (!needs_update)
 		needs_update = TRUE
 		GLOB.lighting_update_corners += src