catch errors on closing

lib/DirectoryWatcher.js

@@ -356,7 +356,7 @@ DirectoryWatcher.prototype.getTimes = function() {
 
 DirectoryWatcher.prototype.close = function() {
 	this.initialScan = false;
-	this.watcher.close();
+	this.watcher.close().catch(this.onWatcherError.bind(this));
 	if(this.nestedWatching) {
 		Object.keys(this.directories).forEach(function(dir) {
 			this.directories[dir].close();