Check that we have at least 1 audio channel available.

audiohandler.cpp

@@ -198,6 +198,12 @@ bool audioHandler::init(audioSetup setupIn)
 	if (format.channelCount() > 2) {
 		format.setChannelCount(2);
 	}
+	else if (format.channelCount() < 1)
+	{
+		qCritical(logAudio()) << (setup.isinput ? "Input" : "Output") << "No channels found, aborting setup.";
+		return false;
+	}
+
 	devChannels = format.channelCount();
 	nativeSampleRate = format.sampleRate();
 	// chunk size is always relative to Internal Sample Rate.