made getRecordingDevices keep already existing devices

--HG--
branch : minor-mic-input

src/modules/audio/null/RecordingDevice.h

@@ -34,7 +34,7 @@ namespace null
 class RecordingDevice : public love::audio::RecordingDevice
 {
 public:
-	RecordingDevice(const char *name, int id);
+	RecordingDevice(const char *name);
 	virtual ~RecordingDevice();
 	virtual bool startRecording();
 	virtual bool startRecording(int samples, int sampleRate, int bitDepth, int channels);