From 580c61ea8622fff946b805f61c0f771304aba934 Mon Sep 17 00:00:00 2001
From: Vivien Nicolas <21@vingtetun.org>
Date: Wed, 14 Jul 2010 18:44:16 +0200
Subject: [PATCH] Bug 578679 - on desktop linux, about:config doesn't display
 in the browser window [r=mfinkle]

---
 mobile/chrome/content/BrowserView.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mobile/chrome/content/BrowserView.js b/mobile/chrome/content/BrowserView.js
index d69057e09251..1451bbba3a71 100644
--- a/mobile/chrome/content/BrowserView.js
+++ b/mobile/chrome/content/BrowserView.js
@@ -597,7 +597,9 @@ BrowserView.prototype = {
 
   getPageZoomLevel: function getPageZoomLevel() {
     let bvs = this._browserViewportState;  // browser exists, so bvs must as well
-    let browserW = this.viewportToBrowser(bvs.viewportRect.right);
+
+    // for xul pages, bvs.viewportRect.right can be 0
+    let browserW = this.viewportToBrowser(bvs.viewportRect.right) || 1.0;
     return this.getVisibleRect().width / browserW;
   },