Fixed situation where Class.getClassLoader returns null for the

bootstrap class loader - JDK 1.1.7 on Linux for example.


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@268001 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -143,7 +143,14 @@ public class Available extends Task {
             if (loader != null) {
                 loader.loadClass(classname);
             } else {
-                this.getClass().getClassLoader().loadClass(classname);
+                ClassLoader l = this.getClass().getClassLoader();
+                // Can return null to represent the bootstrap class loader.
+                // see API docs of Class.getClassLoader.
+                if (l != null) {
+                    l.loadClass(classname);
+                } else {
+                    Class.forName(classname);
+                }
             }
             return true;
         } catch (ClassNotFoundException e) {