lastInsertId() from MySQL returns the new ID as a string instead of a…

…n int which causes issues with the new API not sending an int where an int is expected.

as the autoincremented IDs in MySQL always will be of type int, we cast it after retrieving

src/dba/AbstractModelFactory.class.php

@@ -114,7 +114,7 @@ public function save($model) {
     $stmt = $dbh->prepare($query);
     $stmt->execute($vals);
 
-    $id = $dbh->lastInsertId();
+    $id = intval($dbh->lastInsertId());
     if ($id != 0) {
       $model->setId($id);
       return $model;