yet another JDK 1.1 issue

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@271946 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/util/depend/AbstractAnalyzer.java

@@ -236,7 +236,7 @@ public abstract class AbstractAnalyzer implements DependencyAnalyzer {
      * dependencies and the also list of root classes.
      */
     public void reset() {
-        rootClasses.clear();
+        rootClasses.removeAllElements();
         determined = false;
         fileDependencies = new Vector();
         classDependencies = new Vector();