Oops, logic was backwards. Clean up classloader unless it is added as a reference later.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@810065 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/types/resources/AbstractClasspathResource.java

@@ -188,7 +188,7 @@ public abstract class AbstractClasspathResource extends Resource {
                                                           getProject(),
                                                           p, false);
                 }
-                clNeedsCleanup = loader != null;
+                clNeedsCleanup = loader == null;
             } else {
                 cl = JavaResource.class.getClassLoader();
             }