Fix for the NPE that makes the Cactus build fail.

Actually test6 of taskdef.xml failed as well, I just didnd't run it
after my last changes as it is not part of the testsuite - argh.


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@269402 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/UnknownElement.java

@@ -127,7 +127,7 @@ public class UnknownElement extends Task {
                 realChild = makeTask(child, childWrapper);
                 ((TaskContainer) parent).addTask((Task) realChild);
             } else {
-                ih.createElement(project, parent, child.getTag());
+                realChild = ih.createElement(project, parent, child.getTag());
             }
 
             childWrapper.setProxy(realChild);