Added Source:getChannels. Positional/directional audio only works with 1-channel (mono) sources.

src/modules/audio/openal/Source.h

@@ -95,6 +95,7 @@ public:
 	virtual float getRolloffFactor() const;
 	virtual void setMaxDistance(float distance);
 	virtual float getMaxDistance() const;
+	virtual int getChannels() const;
 
 	void playAtomic();
 	void stopAtomic();
@@ -155,6 +156,8 @@ private:
 	float offsetSamples;
 	float offsetSeconds;
 
+	int channels;
+
 	love::sound::Decoder *decoder;
 
 	unsigned int toLoop;