added no-op static initialize/shutdown to macOS backend

Author: axjxwright

samples/SimplePlayback/src/SimplePlaybackApp.cxx

@@ -20,7 +20,9 @@
 
 #undef HAS_DEBUG_UI
 
-#define FORCE_NVIDIA_CARD_IF_PRESENT
+#ifdef CINDER_MSW
+    #define FORCE_NVIDIA_CARD_IF_PRESENT
+#endif
 
 #ifdef FORCE_NVIDIA_CARD_IF_PRESENT
 extern "C" 

src/osx/AX-MediaPlayerOSXImpl.h

@@ -27,6 +27,9 @@ namespace AX::Video
     {
     public:
 
+        static void StaticInitialize ( );
+        static void StaticShutdown ( );
+        
         Impl    ( MediaPlayer & owner, const ci::DataSourceRef & source, const Format& format );
 
         bool    Update ( );

src/osx/AX-MediaPlayerOSXImpl.mm

@@ -30,6 +30,9 @@
 
 namespace AX::Video
 {
+    void MediaPlayer::Impl::StaticInitialize ( ) { }
+    void MediaPlayer::Impl::StaticShutdown ( ) { }
+    
     MediaPlayer::Impl::Impl ( MediaPlayer & owner, const DataSourceRef & source, const Format& format )
         : _owner ( owner )
         , _source ( source )