Wrong data type for link in insert sql

In migrating to a windows environment that is more strict that our linux environments (I forget the default flag that is on in mysql), we noticed that trying to insert a new ingredient was causing an error. Basically, this is just turning the '%s' placeholder into a %d placeholder.

There's an additional issue with the table, however, because currently link is INT NOT NULL, but the module is passing it a NULL value. I'd also suggest changing that to INT DEFAULT 0, but I'm not sure if that would affect anything else.