From c40508eb16369eecf1efe42d0313b3b4ebc6cd0f Mon Sep 17 00:00:00 2001
From: Karsten von Hornbostel <kaback_spam@yahoo.de>
Date: Tue, 8 Mar 2016 21:25:27 +0100
Subject: [PATCH] fixed crash when QFileDialog is closed without selecting a
 file

---
 spectrogramcontrols.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/spectrogramcontrols.cpp b/spectrogramcontrols.cpp
index cfcb102..c004224 100644
--- a/spectrogramcontrols.cpp
+++ b/spectrogramcontrols.cpp
@@ -127,7 +127,8 @@ void SpectrogramControls::fileOpenButtonClicked()
     QString fileName = QFileDialog::getOpenFileName(
                            this, tr("Open File"), "", tr("Sample file (*.cfile *.bin);;All files (*)")
                        );
-    emit openFile(fileName);
+    if (!fileName.isEmpty())
+        emit openFile(fileName);
 }
 
 void SpectrogramControls::timeSelectionChanged(float time)