Allow ActionController::Base#default_url_options to have a default op…

…tions argument of nil.

This fixes a bug introduced in [6a6b439] which was breaking routing in ActionController::UrlWriter.

actionpack/lib/action_controller/base.rb

@@ -998,7 +998,7 @@ def rewrite_options(options) #:nodoc:
       # As you can infer from the example, this is mostly useful for situations where you want to centralize dynamic decisions about the
       # urls as they stem from the business domain. Please note that any individual url_for call can always override the defaults set
       # by this method.
-      def default_url_options(options) #:doc:
+      def default_url_options(options = nil)
       end
 
       # Redirects the browser to the target specified in +options+. This parameter can take one of three forms:

actionpack/lib/action_controller/routing/optimisations.rb

@@ -61,9 +61,9 @@ def guard_condition
           # if they're using foo_url(:id=>2) it's one 
           # argument, but we don't want to generate /foos/id2
           if number_of_arguments == 1
-            "(!defined?(default_url_options) || default_url_options(nil).blank?) && defined?(request) && request && args.size == 1 && !args.first.is_a?(Hash)"
+            "(!defined?(default_url_options) || default_url_options.blank?) && defined?(request) && request && args.size == 1 && !args.first.is_a?(Hash)"
           else
-            "(!defined?(default_url_options) || default_url_options(nil).blank?) && defined?(request) && request && args.size == #{number_of_arguments}"
+            "(!defined?(default_url_options) || default_url_options.blank?) && defined?(request) && request && args.size == #{number_of_arguments}"
           end
         end
 
@@ -98,7 +98,7 @@ def generation_code
       # argument
       class PositionalArgumentsWithAdditionalParams < PositionalArguments
         def guard_condition
-          "(!defined?(default_url_options) || default_url_options(nil).blank?) && defined?(request) && request && args.size == #{route.segment_keys.size + 1} && !args.last.has_key?(:anchor) && !args.last.has_key?(:port) && !args.last.has_key?(:host)"
+          "(!defined?(default_url_options) || default_url_options.blank?) && defined?(request) && request && args.size == #{route.segment_keys.size + 1} && !args.last.has_key?(:anchor) && !args.last.has_key?(:port) && !args.last.has_key?(:host)"
         end
 
         # This case uses almost the same code as positional arguments, 

actionpack/test/controller/base_test.rb

@@ -52,7 +52,7 @@ class DefaultUrlOptionsController < ActionController::Base
   def default_url_options_action
   end
 
-  def default_url_options(options)
+  def default_url_options(options = nil)
     { :host => 'www.override.com', :action => 'new', :bacon => 'chunky' }
   end
 end