Bug 22908: Prevent ModSuggestion to send a notice if something wrong happened

Bug 22908: Prevent ModSuggestion to send a notice if something wrong happened

There is a return value $status_update_table that is set to 0, then we
send the alert (whatever the value of this variable). We must return
earlier if something happened!

Test plan:
Not sure how to recreate it via the interface, so just run the tests?

Signed-off-by: Liz Rea <wizzyrea@gmail.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>