Search module bug fix

Fix for bug where removing the first website from the search module would cause it to stop working.
Now it defaults to the "oldest" (smallest id number).

Reason: 
It used to be that the search module by default tried to find the website with id = 1 however if a user deletes their first website the db would not shift the other ones back to 1 causing it to crash. Now it defaults to id closest to 1 (smallest out of all of them). 

I also added a small log entry when failing to grab the newznab entry from the db.