fixed NPE in the console output.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@20312 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/resources/hudson/widgets/HistoryWidget/entry.jelly

@@ -27,7 +27,7 @@ THE SOFTWARE.
 -->
 <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" xmlns:i="jelly:fmt">
   <j:set var="link" value="${it.baseUrl}/${build.number}/" />
-  <j:set var="transitive" value="${it.adapter.compare(build,it.firstTransientBuildKey) ge 0 ? 'transitive' : null}" />
+  <j:set var="transitive" value="${it.firstTransientBuildKey and it.adapter.compare(build,it.firstTransientBuildKey) ge 0 ? 'transitive' : null}" />
   <tr class="build-row ${transitive}">
     <td nowrap="nowrap">
       <img width="16" height="16" src="${imagesURL}/16x16/${build.buildStatusUrl}" alt="${build.iconColor.description}" tooltip="${build.iconColor.description}" /><st:nbsp/>