From 0374e59bce7359cfe9228d85bd403af11fa3a537 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20T=C5=AFma?= <tumic@cbox.cz>
Date: Sat, 19 Dec 2015 12:57:09 +0100
Subject: [PATCH] Fixed crash when zooming with no track loaded.

---
 src/track.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/track.cpp b/src/track.cpp
index d9d2d8cd..3dd7b602 100644
--- a/src/track.cpp
+++ b/src/track.cpp
@@ -205,6 +205,9 @@ void Track::redraw()
 
 void Track::wheelEvent(QWheelEvent *event)
 {
+	if (_tracks.isEmpty())
+		return;
+
 	QPointF pos = mapToScene(event->pos());
 	qreal scale = _scale;