Initialize @optional in routing code to avoid warnings

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3163 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Initialize @optional in routing code to avoid warnings about uninitialized access to an instance variable. [Nicholas Seckar]
+
 * Make ActionController's render honor the :locals option when rendering a :file. #1665. [Emanuel Borsboom, Marcel Molina Jr.]
 
 * Allow assert_tag(:conditions) to match the empty string when a tag has no children. Closes #2959. [Jamis Buck]

actionpack/lib/action_controller/routing.rb

@@ -100,6 +100,7 @@ def default=(default)
 
       def initialize(key, options = {})
         @key = key.to_sym
+        @optional = false
         default, @condition = options[:default], options[:condition]
         self.default = default if options.key?(:default)
       end