Routing Mapper with % interpolation on Ruby 1.9.1 fixed [#3837 status:resolved]

Signed-off-by: José Valim <jose.valim@gmail.com>

actionpack/lib/action_dispatch/routing/mapper.rb

@@ -207,8 +207,7 @@ module ActionDispatch
 
           lambda do |env|
             req = Request.new(env)
-
-            uri = URI.parse(path_proc.call(req.params.symbolize_keys))
+            uri = URI.parse(path_proc.call(req.symbolized_path_parameters))
             uri.scheme ||= req.scheme
             uri.host   ||= req.host
             uri.port   ||= req.port unless req.port == 80