bug fix.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@1837 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/resources/hudson/triggers/SCMTrigger/global.jelly

 <j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form">
-  <j:if test="${app.jobs.size()>10}">
+  <j:if test="${app.items.size()>10}">
     <!--
       unless you have a fair number of projects, this option is likely pointless.
       so let's hide this option for new users to avoid confusing them.