Method GetActiveJoystick

src/engine/client/input.h:135–135

	size_t NumJoysticks() const override { return m_vJoysticks.size(); }
	CJoystick *GetJoystick(size_t Index) override { return &m_vJoysticks[Index]; }
	CJoystick *GetActiveJoystick() override { return m_pActiveJoystick; }
	void SetActiveJoystick(size_t Index) override;

	bool MouseRelative(float *pX, float *pY) override;