From b007aaa741b48cc4d2e7ec463380f64cc20d5003 Mon Sep 17 00:00:00 2001
From: seddon <seddon@wikimedia.org>
Date: Tue, 24 Aug 2021 15:06:44 +0100
Subject: [PATCH] Err: param required cant be empty/0 ThumbnailWidth

Bug: T277893
Change-Id: I5b440be10aa30527270515f6921596b8000a9f83
---
 resources/mmv/mmv.ThumbnailWidthCalculator.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/resources/mmv/mmv.ThumbnailWidthCalculator.js b/resources/mmv/mmv.ThumbnailWidthCalculator.js
index f80eb24f9..039d308d8 100644
--- a/resources/mmv/mmv.ThumbnailWidthCalculator.js
+++ b/resources/mmv/mmv.ThumbnailWidthCalculator.js
@@ -162,9 +162,9 @@
 			ratio = sampleHeight / sampleWidth;
 
 		cssWidth = this.calculateFittingWidth( boundingWidth, boundingHeight, sampleWidth, sampleHeight );
-		cssHeight = Math.round( cssWidth * ratio );
+		cssHeight = Math.max( 1, Math.round( cssWidth * ratio ) );
 
-		screenPixelWidth = cssWidth * this.devicePixelRatio;
+		screenPixelWidth = Math.max( 1, cssWidth * this.devicePixelRatio );
 
 		bucketedWidth = this.findNextBucket( screenPixelWidth );