Fixed bug 4091 - Undefined references to Android audio functions when SDL_AUDIO_DISABLED is on

Manuel Sabogal

If SDL is compiled with the Audio subsystem disabled there are some undefined references to the functions ANDROIDAUDIO_ResumeDevices and ANDROIDAUDIO_PauseDevices in the file src/video/android/SDL_androidevents.c.

src/video/android/SDL_androidevents.c

@@ -29,10 +29,15 @@
 #include "SDL_events.h"
 #include "SDL_androidwindow.h"
 
+#if !SDL_AUDIO_DISABLED
 /* Can't include sysaudio "../../audio/android/SDL_androidaudio.h"
  * because of THIS redefinition */
 extern void ANDROIDAUDIO_ResumeDevices(void);
 extern void ANDROIDAUDIO_PauseDevices(void);
+#else
+static void ANDROIDAUDIO_ResumeDevices(void) {}
+static void ANDROIDAUDIO_PauseDevices(void) {}
+#endif
 
 static void 
 android_egl_context_restore()