fix(readdir): close dir in case of error

lib/api/readdir.js

@@ -23,10 +23,10 @@ module.exports = function readdir(path, cb) {
     // SMB2 query directory
     else
       SMB2Request('query_directory', file, connection, function(err, files) {
-        if (err) cb && cb(err);
-        // SMB2 close directory
-        else
-          SMB2Request('close', file, connection, function() {
+        SMB2Request('close', file, connection, function() {
+          if (err) cb && cb(err);
+          // SMB2 close directory
+          else
             cb &&
               cb(
                 null,
@@ -38,7 +38,7 @@ module.exports = function readdir(path, cb) {
                     return v !== '.' && v !== '..';
                   }) // remove '.' and '..' values
               );
-          });
+        });
       });
   });
 };