activated compiler warnings

plugins/samplesource/filesource/filesourcegui.cpp

@@ -209,7 +209,7 @@ void FileSourceGui::sendSettings()
 {
 }
 
-void FileSourceGui::on_playLoop_toggled(bool checked)
+void FileSourceGui::on_playLoop_toggled(bool checked __attribute__((unused)))
 {
 	// TODO: do something about it!
 }
@@ -281,7 +281,7 @@ void FileSourceGui::on_navTimeSlider_valueChanged(int value)
 	}
 }
 
-void FileSourceGui::on_showFileDialog_clicked(bool checked)
+void FileSourceGui::on_showFileDialog_clicked(bool checked __attribute__((unused)))
 {
 	QString fileName = QFileDialog::getOpenFileName(this,
 	    tr("Open I/Q record file"), ".", tr("SDR I/Q Files (*.sdriq)"));

plugins/samplesource/filesource/filesourceinput.cpp

@@ -64,7 +64,6 @@ bool FileSourceInput::Settings::deserialize(const QByteArray& data)
 	}
 
 	if(d.getVersion() == 1) {
-		int intval;
 		d.readString(1, &m_fileName, "./test.sdriq");
 		return true;
 	} else {

plugins/samplesource/filesource/filesourcethread.cpp

@@ -125,8 +125,6 @@ void FileSourceThread::setBuffer(std::size_t chunksize)
 
 void FileSourceThread::run()
 {
-	int res;
-
 	m_running = true;
 	m_startWaiter.wakeAll();