output: fix the "outputenabled" value

Patch 9a5b5998 broke the "outputenabled" value of the "outputs"
response.  Make it print "1" if the output is enabled, "0" otherwise.

src/audio.c

@@ -471,7 +471,7 @@ void printAudioDevices(struct client *client)
 			      "outputenabled: %i\n",
 			      i,
 			      audioOutputArray[i].name,
-			      audioDeviceStates[i]);
+			      audioDeviceStates[i] == DEVICE_ENABLE);
 	}
 }