Make report runner skip reports that have an empty plugin name.

Purely for menu generation.  Jexl oddity corrected
PR: MAVEN-355


git-svn-id: https://svn.apache.org/repos/asf/maven/maven-1/plugins/trunk@113275 13f79535-47bb-0310-9956-ffa450edef68

site/plugin.jelly

@@ -31,9 +31,10 @@
          value="${pom.getPluginContext('maven-xdoc-plugin').getVariable('reports')}"/>
   
     <j:forEach var="report" items="${reports}">
-      <j:if test="${!empty(report.get('pluginName'))}">
+      <j:set var="reportName" value="${report.get('pluginName')}"/>
+      <j:if test="${!empty(reportName)}">
         <echo>Generating the ${report.get('name')}...</echo>
-        <attainGoal name="${report.get('pluginName')}:report"/>
+        <attainGoal name="${reportName}:report"/>
       </j:if>
     </j:forEach>
   </goal>