Make <antcall> and <ant> more Script-friendly.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@268805 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/Ant.java

@@ -205,6 +205,7 @@ public class Ant extends Task {
             // Are we trying to call the target in which we are defined?
             if (p1.getBaseDir().equals(project.getBaseDir()) &&
                 p1.getProperty("ant.file").equals(project.getProperty("ant.file")) &&
+                getOwningTarget() != null &&
                 target.equals(this.getOwningTarget().getName())) { 
 
                 throw new BuildException("ant task calling its own parent target");

src/main/org/apache/tools/ant/taskdefs/CallTarget.java

@@ -82,6 +82,7 @@ public class CallTarget extends Task {
 
     private Ant callee;
     private String subTarget;
+    private boolean initialized = false;
 
     public void init() {
         callee = (Ant) project.createTask("ant");
@@ -89,9 +90,14 @@ public class CallTarget extends Task {
         callee.setTaskName(getTaskName());
         callee.setLocation(location);
         callee.init();
+        initialized = true;
     }
 
     public void execute() {
+        if (!initialized) {
+            init();
+        }
+        
         if (subTarget == null) {
             throw new BuildException("Attribute target is required.", 
                                      location);