Delete user informs about a page with author while no page is displayed

Reproduction steps:

• Register a new user and login with it
• Immediately log out
• Login with Administrator account, go in Administration > User
• Disable the user which has just been registered
• Click on the cross to delete the user

Expected result:

• The user is properly deleted since the user didn't perform any changes. If there was a page automatically created with the user as author, then the warning about Author should be displayed and the Index link should show the pages created by the user

Obtained result:

• A warning is displayed saying the user created 1 page, but when clicking on the link to display the page, the LT is empty.