Avoided clean to fail if no test/html

build.xml

@@ -384,7 +384,7 @@
   <!-- tested -->
   <target name="cleantest" depends="bind" description="Clean up test directory">
     <echo message="Cleaning tests..."/>
-    <delete includeemptydirs="true">
+    <delete includeemptydirs="true" failonerror="false">
       <fileset dir="test/classes" includes="**/*.class"/>
       <fileset dir="test/output" includes="**/*.*"/>
       <fileset dir="test/html" includes="**"/>

html/relnotes.html

@@ -63,7 +63,7 @@ with a warning:
 
 <!--h2>Version 4.10 (2xxx): ??/??/201X - Pumpkin risotto</h2-->
 
-<h2>Version 4.9 (2158): 19/07/2017 - Letraset</h2>
+<h2>Version 4.9 (2159): 19/07/2017 - Letraset</h2>
 
 <p><ul compact="1">
 <li><span style="color: red;">Suppressed</span> empty constructor in <tt>DBServiceImpl</tt> (serv)</li>