URLClassLoader fails to get resource from directory in Class-Path.

The URLClassLoader does not retrieve an image resource via its
URLClassLoader.getResource() method call when the image resource
is specified as a directory in the manifest file of the JAR file
where the java program is.

The test cases for this is: javax/tests/dwn/T12

This test case uses the "java" interpreter and hence uses the
URLClassLoader.

Type "make all; make run" to run the test. It fails to get the image
resource "sunlogo.gif" using the URLClassLoader.getResource() method
call.

Here is the contents of the JAR file for test T12.

   323 Wed Feb 11 13:51:42 EST 1998 META-INF/MANIFEST.MF
   270 Wed Feb 11 13:48:54 EST 1998 AppType.class
  3692 Wed Feb 11 13:48:56 EST 1998 T12.class
   473 Wed Feb 11 13:48:54 EST 1998 T12Frame$1.class
   965 Wed Feb 11 13:48:54 EST 1998 T12Frame.class

Here is the manifest file as part of the above JAR.

Manifest-Version: 1.0
Main-Class: T12
Class-Path: images/

The URLClassLoader should be able to retreive the URL to the image resource
by calling its URLClassLoader.getResource("images/sunlogo.gif") method.

Notice that the test javax/tests/dwn/T12b which is the same test case
as above but uses the "appletviewer" tool PASSES. This test case uses
the AppletClassLoader which PASSES.