don't normalize path if it's empty on adding a file throught web interface

rhodecode/controllers/files.py

@@ -377,6 +377,7 b' class FilesController(BaseRepoController'
                           'contain .. in path'), category='warning')
                 return redirect(url('changeset_home', repo_name=c.repo_name,
                                     revision='tip'))
+            if location:
             location = os.path.normpath(location)
             filename = os.path.basename(filename)
             node_path = os.path.join(location, filename)