Noting #1248

Signed-off-by: NOleg Nenashev <o.v.nenashev@gmail.com>

changelog.html

@@ -70,6 +70,9 @@ Upcoming changes</a>
   <li class="bug">
     Jenkins on Linux can not restart after plugin update when started without full path to java executable
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-22818">issue 22818</a>)
+  <li class="bug">
+    Fixed <code>NullPointerException</code> when a build triggering returns null cause
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-20499">issue 20499</a>)
 </ul>
 </div><!--=TRUNK-END=-->