Show "v." in cover only when version is not empty

git-svn-id: https://svn.apache.org/repos/asf/maven/maven-1/plugins/trunk@116015 13f79535-47bb-0310-9956-ffa450edef68

pdf/xdocs/changes.xml

@@ -23,6 +23,7 @@
   </properties>
   <body>
     <release version="2.2-SNAPSHOT" date="In CVS">
+      <action dev="carlos" type="fix">Show "v." in cover only when version is not empty.</action>
       <action dev="aheritier" type="add" issue="MPPDF-10" due-to="M. Sean Gilligan">Add USLetter (8.5"x11") as a paper type.</action>
     </release>  
     <release version="2.1" date="2004-05-15">