. Fix for http://issues.alfresco.com/browse/AWC-1082

- Deleting the Guest Home space no longer means an exception occurs when any user attempts a Guest login
 - The "go direct to login page url" workaround is no longer required
 - A redirection to the login page occurs automatically if the Guest Home space is deleted and a warning output to the console

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@4907 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/web/app/servlet/AuthenticationHelper.java

@@ -145,7 +145,9 @@ public final class AuthenticationHelper
                   // check that the home space node exists - else Guest cannot proceed
                   if (nodeService.exists(guestHomeRef) == false)
                   {
-                     throw new InvalidNodeRefException(guestHomeRef);
+                     // cannot login as Guest as Home is missing - return to login screen
+                     logger.warn("Unable to locate Guest Home space - may have been deleted?");
+                     throw new AuthenticationException("");
                   }
                   user.setHomeSpaceId(guestHomeRef.getId());