output/osx: don't uninitialize AudioUnit if restart fails

This shall be done by Close(), which will be called automatically
after an error.

src/output/plugins/OSXOutputPlugin.cxx

@@ -763,10 +763,9 @@ OSXOutput::Play(const void *chunk, size_t size)
 	assert(size > 0);
 	if (pause) {
 		OSStatus status = AudioOutputUnitStart(au);
-		if (status != 0) {
-			AudioUnitUninitialize(au);
+		if (status != noErr)
 			throw std::runtime_error("Unable to restart audio output after pause");
-		}
+
 		pause = false;
 	}
 #ifdef ENABLE_DSD