Merge pull request #15 from r3wt/master

fix problem  in firefox with empty file upload

lib/index.js

@@ -32,6 +32,14 @@ module.exports = function(options) {
  file.on('end', function() {
  if (!req.files)
  req.files = {};
+
+
+ // see: https://github.com/richardgirges/express-fileupload/issues/14
+ // firefox uploads empty file in case of cache miss when f5ing page.
+ // resulting in unexpected behavior. if there is no file data, the file is invalid.
+
+ if(!buf.length) 
+ return;
 
  return req.files[fieldname] = {
  name: filename,
@@ -50,6 +58,8 @@ module.exports = function(options) {
  });
  }
  };
+
+
  });
  });