use new #head method

git-svn-id: http://svn.techno-weenie.net/projects/plugins/exception_logger@2504 567b1171-46fb-0310-a4c9-b4bef9110e78

lib/exception_loggable.rb

@@ -54,16 +54,16 @@ def local_request?
   end
 
   def render_404(exception)
-    respond_to do |type|
-      type.html { render :file => "#{RAILS_ROOT}/public/404.html", :status => "404 Not Found" }
-      type.all  { render :nothing => true, :status => "404 Not Found" }
+    respond_to do |format|
+      format.html { render :file => "#{RAILS_ROOT}/public/404.html", :status => 400 }
+      format.all  { head :status => 404 }
     end
   end
 
   def render_500(exception)
-    respond_to do |type|
-      type.html { render :file => "#{RAILS_ROOT}/public/500.html", :status => "500 Error" }
-      type.all  { render :nothing => true, :status => "500 Error" }
+    respond_to do |format|
+      format.html { render :file => "#{RAILS_ROOT}/public/500.html", :status => 500 }
+      format.all  { head :status => 500 }
     end
   end