Fix nil error for requests with empty PATH_INFO header such as those which are...

Fix nil error for requests with empty PATH_INFO header such as those which are send by the ScanAlert spider


git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@6451 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/lib/action_controller/request.rb

@@ -209,7 +209,7 @@ def request_uri
 
     # Returns the interpreted path to requested resource after all the installation directory of this application was taken into account
     def path
-      path = (uri = request_uri) ? uri.split('?').first : ''
+      path = (uri = request_uri) ? uri.split('?').first.to_s : ''
 
       # Cut off the path to the installation directory if given
       path.sub!(%r/^#{relative_url_root}/, '')