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User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.5) Gecko/20030925

Description of problem:
When a content bundle has more than one language instance, the UI
shows a "delete" link on the Languages tab for all but the currently
viewed language instance. Trying to delete the bundle's primary
language instance results in a violated assertion in
ContentBundle.removeInstance().


Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. Create a new Article
2. Go to the Languages tab and add a language instance
3. Go to the Languages tab and click on the Delete link


Actual Results:  com.arsdigita.util.AssertionError:
[com.arsdigita.cms.contenttypes.Article:{id=1052}]
equals [com.arsdigita.cms.contenttypes.Article:{id=1052}]
	at com.arsdigita.util.Assert.unequal(Assert.java:295)
	at com.arsdigita.cms.ContentBundle.removeInstance(ContentBundle.java:208)
	at
com.arsdigita.cms.ui.item.ItemLanguagesTable$InstanceDeleter.cellSelected(ItemLanguagesTable.java:160)


Expected Results:  Either the Delete link should not be shown for the
primary instance, or the current language instance should be made
primary before deleting the selected language.


Additional info: