Fix other audio backends

src/Backends/Audio/Null.cpp

@@ -69,3 +69,8 @@ void AudioBackend_SetOrganyaTimer(unsigned int milliseconds)
 {
 	(void)milliseconds;
 }
+
+void AudioBackend_SleepOrganya(unsigned int milliseconds)
+{
+	(void)milliseconds;
+}

src/Backends/Audio/WiiU-Hardware.cpp

@@ -420,3 +420,11 @@ void AudioBackend_SetOrganyaTimer(unsigned int milliseconds)
 
 	OSUnlockMutex(&organya_mutex);
 }
+
+void AudioBackend_SleepOrganya(unsigned int milliseconds)
+{
+	(void)milliseconds;
+
+	// TODO - Figure out how to do this.
+	// Honestly, I might not bother - this backend has never worked properly.
+}