fix delete button link in organization (bs2 template)

ckan/templates-bs2/organization/member_new.html

@@ -56,7 +56,7 @@ <h1 class="page-heading">
     {{ form.select('role', label=_('Role'), options=c.roles, selected=c.user_role, error='', attrs=format_attrs) }}
     <div class="form-actions">
       {% if user %}
-        <a href="{{ h.url_for(group_type + '.member_delete', id=c.group_dict.id, user=user_id) }}" class="btn btn-danger pull-left" data-module="confirm-action" data-module-content="{{ _('Are you sure you want to delete this member?') }}">{{ _('Delete') }}</a>
+        <a href="{{ h.url_for(group_type + '.member_delete', id=c.group_dict.id, user=user.id) }}" class="btn btn-danger pull-left" data-module="confirm-action" data-module-content="{{ _('Are you sure you want to delete this member?') }}">{{ _('Delete') }}</a>
         <button class="btn btn-primary" type="submit" name="submit" >
           {{ _('Update Member') }}
         </button>