[Mark Wallis (aka serialmonkey)]

If a module fails to install or upgrade (like, the XML is incorrect) then the
manage modules page still reports that the module was successfully
installed.

We need to display errors warning the user that the installation failed.

• status: open --> closed-fixed

Logged In: YES
user_id=342445

Commited a small fix to remove the chance of this happening. Will be included
in 1.1