avoid stax exception when all phases are disabled

andrug

26.44.2008 0d5c92ecde5bd7ebf8fe1d55740446b160f9bb19

avoid stax exception when all phases are disabled

 opends/tests/system-tests/phases/verdict/verdict.xml

@@ -211,6 +211,8 @@
        nbItemSuccess = 0
        percentageResult = 0
      </script>
      <if expr="nbItems > 0 ">
        <sequence>
      <iterate in="items" var="item">
        <script>
          if item[1] == 0:
@@ -222,6 +224,13 @@
        percentageResult = percentageResult / nbItems
        phase.setPercentage(percentageResult)
      </script>
        </sequence>
      <else>
        <script>
          phase.setPercentage('100')
        </script>
      </else>
      </if>
      
      <!--==========  Call postphase =========-->
      <call function="'phasePostamble'">