From 8679b70b4cb2c1fb1d9810e51583a6ac6d234651 Mon Sep 17 00:00:00 2001
From: sledgehammer999 <hammered999@gmail.com>
Date: Wed, 26 Aug 2015 20:38:01 +0300
Subject: [PATCH] Backport fix for crash when invalid favicon is downloaded.
 Closes #3632.

---
 src/gui/transferlistfilterswidget.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/gui/transferlistfilterswidget.cpp b/src/gui/transferlistfilterswidget.cpp
index f254d107f..bd7f5b44c 100644
--- a/src/gui/transferlistfilterswidget.cpp
+++ b/src/gui/transferlistfilterswidget.cpp
@@ -619,7 +619,8 @@ void TrackerFiltersList::handleFavicoDownload(const QString& url, const QString&
     QListWidgetItem *trackerItem = item(rowFromTracker(host));
     QIcon icon(filePath);
     //Detect a non-decodable icon
-    bool invalid = icon.pixmap(icon.availableSizes().first()).isNull();
+    QList<QSize> sizes = icon.availableSizes();
+    bool invalid = (sizes.size() > 0 ? icon.pixmap(sizes.first()).isNull() : true);
     if (invalid) {
         if (url.endsWith(".ico", Qt::CaseInsensitive)) {
             Logger::instance()->addMessage(tr("Couldn't decode favicon for URL `%1`. Trying to download favicon in PNG format.").arg(url),