bug fix

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@13044 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/resources/lib/hudson/progressBar.jelly

@@ -7,7 +7,7 @@
     red  : if set to non-null, the progress bar will be drawn in red, to indicate that the processing is likely stuck.
 -->
 <j:jelly xmlns:j="jelly:core" xmlns:x="jelly:xml" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form">
-  <table class="progress-bar ${h.ifThenElse(attrs.red!=null,'red',null)}" id="${attrs.id}" tooltip="${attrs.tooltip}" href="${attrs.href}" style="${h.ifThenElse(attrs.href!=null,'cursor:pointer',null)}">
+  <table class="progress-bar ${h.ifThenElse(attrs.red,'red',null)}" id="${attrs.id}" tooltip="${attrs.tooltip}" href="${attrs.href}" style="${h.ifThenElse(attrs.href!=null,'cursor:pointer',null)}">
     <j:choose>
       <j:when test="${pos lt 0}">
         <!-- style sheet will fill in the progress bar image -->