Flash messages on CustomFields destroy (#24801).

Patch by Javier Menéndez.

git-svn-id: http://svn.redmine.org/redmine/trunk@16348 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/custom_fields_controller.rb

@@ -76,7 +76,9 @@ class CustomFieldsController < ApplicationController
 
   def destroy
     begin
-      @custom_field.destroy
+      if @custom_field.destroy
+        flash[:notice] = l(:notice_successful_delete)
+      end
     rescue
       flash[:error] = l(:error_can_not_delete_custom_field)
     end