From 30dc021bf728f7933dbd6d2fd5bc546917b6974b Mon Sep 17 00:00:00 2001
From: Matt Bierner <matb@microsoft.com>
Date: Mon, 7 Oct 2019 14:15:08 -0700
Subject: [PATCH] null -> undefined

---
 .../viewParts/overviewRuler/decorationsOverviewRuler.ts       | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/vs/editor/browser/viewParts/overviewRuler/decorationsOverviewRuler.ts b/src/vs/editor/browser/viewParts/overviewRuler/decorationsOverviewRuler.ts
index a4e988745cb..9c1edf519e0 100644
--- a/src/vs/editor/browser/viewParts/overviewRuler/decorationsOverviewRuler.ts
+++ b/src/vs/editor/browser/viewParts/overviewRuler/decorationsOverviewRuler.ts
@@ -61,8 +61,8 @@ class Settings {
 		const minimapOpts = options.get(EditorOption.minimap);
 		const minimapEnabled = minimapOpts.enabled;
 		const minimapSide = minimapOpts.side;
-		const backgroundColor = (minimapEnabled ? TokenizationRegistry.getDefaultBackground() : null);
-		if (backgroundColor === null || minimapSide === 'left') {
+		const backgroundColor = (minimapEnabled ? TokenizationRegistry.getDefaultBackground() : undefined);
+		if (typeof backgroundColor === 'undefined' || minimapSide === 'left') {
 			this.backgroundColor = null;
 		} else {
 			this.backgroundColor = Color.Format.CSS.formatHex(backgroundColor);
-- 
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