fix AudioOut pacing

Co-authored-by: Stefanos Costa <stefanos.costa1999@gmail.com>

src/libs/audio_internal.h

@@ -26,6 +26,7 @@ static constexpr int OUT_PORTS_MAX = 32;
 
 int      AudioOutOpen(int type, uint32_t samples_num, uint32_t freq, Format format);
 void     AudioOutClose(int handle);
+bool     AudioOutHasDevice(int handle);
 uint32_t AudioOutOutputs(const OutputParam* params, uint32_t num, bool blocking = true);
 
 } // namespace Libs::Audio::AudioInternal