fix method signature--accidentally and unnecessarily opening up access

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@454827 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/types/resources/selectors/ResourceSelectorContainer.java

@@ -107,7 +107,7 @@ public class ResourceSelectorContainer extends DataType {
      * @param p   the Project to resolve against.
      * @throws BuildException on error.
      */
-    public void dieOnCircularReference(Stack stk, Project p) {
+    protected void dieOnCircularReference(Stack stk, Project p) {
         if (isChecked()) {
             return;
         }