Make starteam checkout handle deleted labels correctly.

PR: 17646
Submitted by:	Brian Brooks <brian dot brooks at metavante dot com>
Reviewed by:	Steve Cohen


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@274317 13f79535-47bb-0310-9956-ffa450edef68

WHATSNEW

@@ -70,6 +70,8 @@ Fixed bugs:
   StringIndexOutOfBoundsException on all OSes where os.name is shorter
   than seven characters.  Bugzilla Report 18105.
 
+* starteam checkout can now handle deleted labels.  Bugzilla Report 17646.
+
 Other changes:
 --------------
 * The filesetmanifest attribute of <jar> has been reenabled.

src/main/org/apache/tools/ant/taskdefs/optional/starteam/TreeBasedTask.java

@@ -566,7 +566,7 @@ public abstract class TreeBasedTask extends StarTeamTask {
         for (int i = 0; i < allLabels.length; i++) {
             Label stLabel = allLabels[i];
             log("checking label " + stLabel.getName(), Project.MSG_DEBUG);
-            if (stLabel.getName().equals(this.label)) {
+            if (stLabel != null && !stLabel.isDeleted() && stLabel.getName().equals(this.label)) {
                 if (!stLabel.isRevisionLabel() && !stLabel.isViewLabel()) {
                     throw new BuildException("Unexpected label type.");
                 }