DownloadItem: Fix calculating remaining time

It is still not correct as it uses QTime which can only represent
24 hour timeframe.

src/lib/downloads/downloaditem.cpp

@@ -1,6 +1,6 @@
 /* ============================================================
 * Falkon - Qt web browser
-* Copyright (C) 2010-2017 David Rosca <nowrep@gmail.com>
+* Copyright (C) 2010-2018 David Rosca <nowrep@gmail.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
@@ -235,7 +235,7 @@ void DownloadItem::updateDownloadInfo(double currSpeed, qint64 received, qint64
     QString speed = currentSpeedToString(currSpeed);
     // We have QString speed now
 
-    QTime time;
+    QTime time(0, 0, 0);
     time = time.addSecs(estimatedTime);
     QString remTime = remaingTimeToString(time);
     m_remTime = time;