Fix the guess type for int

Fixing the issue with the guessing of the int type.

When a hint is not provided the int is guessed as double all the time and consequently fails.

CREATE TABLE int_fails (
  id text,
  fake_int int,
  PRIMARY KEY ((id), fake_int)
);

var query = 'INSERT INTO int_fails (id, fake_int) VALUES (?, ?)';
var params = ['foo', 1];