forward verify operation to references

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@421587 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/types/selectors/BaseSelector.java

@@ -71,6 +71,9 @@ public abstract class BaseSelector extends DataType implements FileSelector {
      * setError() as necessary.</p>
      */
     public void verifySettings() {
+        if(isReference()) {
+            ((BaseSelector)getCheckedRef()).verifySettings();
+        }
     }