fixed possibility of hanging process on --remove and fixed an error i…

…n FSStorage.close

bin/cmd.js

@@ -108,6 +108,9 @@ client.server.once('listening', function () {
 })
 
 function remove () {
+  process.removeListener('SIGINT', remove)
+  process.removeListener('SIGTERM', remove)
+
   client.destroy(function () {
     process.nextTick(function () {
       process.exit()

lib/fs_storage.js

@@ -186,7 +186,7 @@ FSStorage.prototype.close = function (cb) {
 			if (i >= self.files.length) return cb()
 			if (err) return cb(err)
 			var next = self.files[i++]
-			if (!next) return process.nextTick(loop)
+			if (!next || !next.fd) return process.nextTick(loop)
 			next.fd.close(loop)
 		}